/**
* Map all devices into userspace memory.
*
* @param ws2811 ws2811 instance pointer.
*
* @returns 0 on success, -1 otherwise.
*/
static int map_registers(ws2811_t *ws2811)
{
ws2811_device_t *device = ws2811->device;
uint32_t dma_addr = dmanum_to_phys(ws2811->dmanum);
uint32_t base = board_info_peripheral_base_addr();
if (!dma_addr)
{
return -1;
}
device->dma = mapmem(dma_addr, sizeof(dma_t));
if (!device->dma)
{
return -1;
}
device->pwm = mapmem(PWM_OFFSET + base, sizeof(pwm_t));
if (!device->pwm)
{
return -1;
}
device->gpio = mapmem(GPIO_OFFSET + base, sizeof(gpio_t));
if (!device->gpio)
{
return -1;
}
device->cm_pwm = mapmem(CM_PWM_OFFSET + base, sizeof(cm_pwm_t));
if (!device->cm_pwm)
{
return -1;
}
return 0;
}
void dispmanxtest() {
DISPMANX_DISPLAY_HANDLE_T display;
int ret;
DISPMANX_MODEINFO_T displayinfo;
DISPMANX_RESOURCE_HANDLE_T res;
int width = 1024;
int height = 576;
uint32_t vc_image_ptr;
DISPMANX_UPDATE_HANDLE_T update;
VC_RECT_T dst_rect,src_rect;
DISPMANX_ELEMENT_HANDLE_T element;
bcm_host_init();
display = vc_dispmanx_display_open(0);
ret = vc_dispmanx_display_get_info( display, &displayinfo);
assert(ret==0);
printf("display is %dx%d\n",displayinfo.width,displayinfo.height);
res = vc_dispmanx_resource_create(VC_IMAGE_YUV420,width,height,&vc_image_ptr);
vc_image_ptr = vc_dispmanx_resource_get_image_handle(res);
printf("vc_image_ptr %x\n",vc_image_ptr);
assert(res);
update = vc_dispmanx_update_start(10);
assert(update);
vc_dispmanx_rect_set(&src_rect,0,0,width<<16,height<<16);
vc_dispmanx_rect_set(&dst_rect,0,(displayinfo.height - height)/2,width-32,height);
element = vc_dispmanx_element_add(update,display,2000,&dst_rect,res,&src_rect,DISPMANX_PROTECTION_NONE,NULL,NULL,DISPMANX_NO_ROTATE);
ret = vc_dispmanx_update_submit_sync(update);
assert(ret==0);
uint8_t *rawfb = (uint8_t*)mapmem(vc_image_ptr,0x1000);
for (int i=0; i<0x100; i++) {
printf("%02x ",rawfb[i]);
}
printf("\n");
unmapmem(rawfb,0x1000);
puts("sleeping");
sleep(10);
update = vc_dispmanx_update_start(10);
assert(update);
ret = vc_dispmanx_element_remove(update,element);
assert(ret==0);
ret = vc_dispmanx_update_submit_sync(update);
assert(ret==0);
ret = vc_dispmanx_resource_delete(res);
assert(ret==0);
ret = vc_dispmanx_display_close(display);
assert(ret==0);
}
// Execute a nop control list to prove that we have contol.
void testControlLists() {
// First we allocate and map some videocore memory to build our control list in.
// ask the blob to allocate us 256 bytes with 4k alignment, zero it.
unsigned int handle = mem_alloc(mbox, 0x100, 0x1000, MEM_FLAG_COHERENT | MEM_FLAG_ZERO);
if (!handle) {
printf("Error: Unable to allocate memory");
return;
}
// ask the blob to lock our memory at a single location at give is that address.
uint32_t bus_addr = mem_lock(mbox, handle);
// map that address into our local address space.
uint8_t *list = (uint8_t*) mapmem(bus_addr, 0x100);
// Now we construct our control list.
// 255 nops, with a halt somewhere in the middle
for(int i = 0; i < 0xff; i++) {
list[i] = 1; // NOP
}
list[0xbb] = 0; // Halt.
// And then we setup the v3d pipeline to execute the control list.
printf("V3D_CT0CS: 0x%08x\n", v3d[V3D_CT0CS]);
printf("Start Address: 0x%08x\n", bus_addr);
// Current Address = start of our list (bus address)
v3d[V3D_CT0CA] = bus_addr;
// End Address = just after the end of our list (bus address)
// This also starts execution.
v3d[V3D_CT0EA] = bus_addr + 0x100;
// print status while running
printf("V3D_CT0CS: 0x%08x, Address: 0x%08x\n", v3d[V3D_CT0CS], v3d[V3D_CT0CA]);
// Wait a second to be sure the contorl list execution has finished
while(v3d[V3D_CT0CS] & 0x20);
// print the status again.
printf("V3D_CT0CS: 0x%08x, Address: 0x%08x\n", v3d[V3D_CT0CS], v3d[V3D_CT0CA]);
// Release memory;
unmapmem((void *) list, 0x100);
mem_unlock(mbox, handle);
mem_free(mbox, handle);
}
char InitDma(void *FunctionTerminate)
{
//printf("Init DMA\n");
// Catch all signals possible - it is vital we kill the DMA engine
// on process exit!
int i;
for (i = 0; i < 64; i++) {
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = FunctionTerminate;//terminate;
sigaction(i, &sa, NULL);
}
NUM_SAMPLES = NUM_SAMPLES_MAX;
/* Use the mailbox interface to the VC to ask for physical memory */
/*unlink(MBFILE);
if (mknod(MBFILE, S_IFCHR|0600, makedev(100, 0)) < 0)
{
printf("Failed to create mailbox device\n");
return 0;
}
*/
mbox.handle = mbox_open();
if (mbox.handle < 0)
{
printf("Failed to open mailbox\n");
return(0);
}
mbox.mem_ref = mem_alloc(mbox.handle, NUM_PAGES* PAGE_SIZE, PAGE_SIZE, mem_flag);
/* TODO: How do we know that succeeded? */
//printf("mem_ref %x\n", mbox.mem_ref);
mbox.bus_addr = mem_lock(mbox.handle, mbox.mem_ref);
//printf("bus_addr = %x\n", mbox.bus_addr);
mbox.virt_addr = mapmem(BUS_TO_PHYS(mbox.bus_addr), NUM_PAGES* PAGE_SIZE);
//printf("virt_addr %p\n", mbox.virt_addr);
virtbase = (uint32_t *)mbox.virt_addr;
//printf("virtbase %p\n", virtbase);
return(1);
}
int main(int argc, char **argv) {
mbox = mbox_open();
// The blob now has this nice handy call which powers up the v3d pipeline.
qpu_enable(mbox, 1);
// map v3d's registers into our address space.
v3d = (unsigned *) mapmem(0x20c00000, 0x1000);
if(v3d[V3D_IDENT0] != 0x02443356) { // Magic number.
printf("Error: V3D pipeline isn't powered up and accessable.\n");
exit(-1);
}
// We now have access to the v3d registers, we should do something.
testTriangle();
return 0;
}
/* Initialise this library. */
int bcm2835_init(void)
{
int memfd;
int ok;
FILE *fp;
if (debug)
{
bcm2835_peripherals = (uint32_t*)BCM2835_PERI_BASE;
bcm2835_pads = bcm2835_peripherals + BCM2835_GPIO_PADS/4;
bcm2835_clk = bcm2835_peripherals + BCM2835_CLOCK_BASE/4;
bcm2835_gpio = bcm2835_peripherals + BCM2835_GPIO_BASE/4;
bcm2835_pwm = bcm2835_peripherals + BCM2835_GPIO_PWM/4;
bcm2835_spi0 = bcm2835_peripherals + BCM2835_SPI0_BASE/4;
bcm2835_bsc0 = bcm2835_peripherals + BCM2835_BSC0_BASE/4;
bcm2835_bsc1 = bcm2835_peripherals + BCM2835_BSC1_BASE/4;
bcm2835_st = bcm2835_peripherals + BCM2835_ST_BASE/4;
return 1; /* Success */
}
/* Figure out the base and size of the peripheral address block
// using the device-tree. Required for RPi2, optional for RPi 1
*/
if ((fp = fopen(BMC2835_RPI2_DT_FILENAME , "rb")))
{
unsigned char buf[4];
fseek(fp, BMC2835_RPI2_DT_PERI_BASE_ADDRESS_OFFSET, SEEK_SET);
if (fread(buf, 1, sizeof(buf), fp) == sizeof(buf))
bcm2835_peripherals_base = (uint32_t *)(buf[0] << 24 | buf[1] << 16 | buf[2] << 8 | buf[3] << 0);
fseek(fp, BMC2835_RPI2_DT_PERI_SIZE_OFFSET, SEEK_SET);
if (fread(buf, 1, sizeof(buf), fp) == sizeof(buf))
bcm2835_peripherals_size = (buf[0] << 24 | buf[1] << 16 | buf[2] << 8 | buf[3] << 0);
fclose(fp);
}
/* else we are prob on RPi 1 with BCM2835, and use the hardwired defaults */
/* Now get ready to map the peripherals block
* If we are not root, try for the new /dev/gpiomem interface and accept
* the fact that we can only access GPIO
* else try for the /dev/mem interface and get access to everything
*/
memfd = -1;
ok = 0;
if (geteuid() == 0)
{
/* Open the master /dev/mem device */
if ((memfd = open("/dev/mem", O_RDWR | O_SYNC) ) < 0)
{
fprintf(stderr, "bcm2835_init: Unable to open /dev/mem: %s\n",
strerror(errno)) ;
goto exit;
}
/* Base of the peripherals block is mapped to VM */
bcm2835_peripherals = mapmem("gpio", bcm2835_peripherals_size, memfd, (uint32_t)bcm2835_peripherals_base);
if (bcm2835_peripherals == MAP_FAILED) goto exit;
/* Now compute the base addresses of various peripherals,
// which are at fixed offsets within the mapped peripherals block
// Caution: bcm2835_peripherals is uint32_t*, so divide offsets by 4
*/
bcm2835_gpio = bcm2835_peripherals + BCM2835_GPIO_BASE/4;
bcm2835_pwm = bcm2835_peripherals + BCM2835_GPIO_PWM/4;
bcm2835_clk = bcm2835_peripherals + BCM2835_CLOCK_BASE/4;
bcm2835_pads = bcm2835_peripherals + BCM2835_GPIO_PADS/4;
bcm2835_spi0 = bcm2835_peripherals + BCM2835_SPI0_BASE/4;
bcm2835_bsc0 = bcm2835_peripherals + BCM2835_BSC0_BASE/4; /* I2C */
bcm2835_bsc1 = bcm2835_peripherals + BCM2835_BSC1_BASE/4; /* I2C */
bcm2835_st = bcm2835_peripherals + BCM2835_ST_BASE/4;
ok = 1;
}
else
{
/* Not root, try /dev/gpiomem */
/* Open the master /dev/mem device */
if ((memfd = open("/dev/gpiomem", O_RDWR | O_SYNC) ) < 0)
{
fprintf(stderr, "bcm2835_init: Unable to open /dev/gpiomem: %s\n",
strerror(errno)) ;
goto exit;
}
/* Base of the peripherals block is mapped to VM */
bcm2835_peripherals_base = 0;
bcm2835_peripherals = mapmem("gpio", bcm2835_peripherals_size, memfd, (uint32_t)bcm2835_peripherals_base);
if (bcm2835_peripherals == MAP_FAILED) goto exit;
bcm2835_gpio = bcm2835_peripherals;
ok = 1;
}
exit:
if (memfd >= 0)
close(memfd);
if (!ok)
bcm2835_close();
return ok;
}
int
main(int argc, char **argv)
{
parseargs(argc, argv);
mbox.handle = mbox_open();
if (mbox.handle < 0)
fatal("Failed to open mailbox\n");
unsigned mbox_board_rev = get_board_revision(mbox.handle);
printf("MBox Board Revision: %#x\n", mbox_board_rev);
get_model(mbox_board_rev);
unsigned mbox_dma_channels = get_dma_channels(mbox.handle);
printf("DMA Channels Info: %#x, using DMA Channel: %d\n", mbox_dma_channels, DMA_CHAN_NUM);
printf("Using hardware: %5s\n", delay_hw == DELAY_VIA_PWM ? "PWM" : "PCM");
printf("Number of channels: %5d\n", (int)num_channels);
printf("PWM frequency: %5d Hz\n", 1000000/CYCLE_TIME_US);
printf("PWM steps: %5d\n", NUM_SAMPLES);
printf("Maximum period (100 %%): %5dus\n", CYCLE_TIME_US);
printf("Minimum period (%1.3f%%): %5dus\n", 100.0*SAMPLE_US / CYCLE_TIME_US, SAMPLE_US);
printf("DMA Base: %#010x\n", DMA_BASE);
setup_sighandlers();
/* map the registers for all DMA Channels */
dma_virt_base = map_peripheral(DMA_BASE, (DMA_CHAN_SIZE * (DMA_CHAN_MAX + 1)));
/* set dma_reg to point to the DMA Channel we are using */
dma_reg = dma_virt_base + DMA_CHAN_NUM * (DMA_CHAN_SIZE / sizeof(dma_reg));
pwm_reg = map_peripheral(PWM_BASE, PWM_LEN);
pcm_reg = map_peripheral(PCM_BASE, PCM_LEN);
clk_reg = map_peripheral(CLK_BASE, CLK_LEN);
gpio_reg = map_peripheral(GPIO_BASE, GPIO_LEN);
/* Use the mailbox interface to the VC to ask for physical memory */
mbox.mem_ref = mem_alloc(mbox.handle, NUM_PAGES * PAGE_SIZE, PAGE_SIZE, mem_flag);
/* TODO: How do we know that succeeded? */
dprintf("mem_ref %u\n", mbox.mem_ref);
mbox.bus_addr = mem_lock(mbox.handle, mbox.mem_ref);
dprintf("bus_addr = %#x\n", mbox.bus_addr);
mbox.virt_addr = mapmem(BUS_TO_PHYS(mbox.bus_addr), NUM_PAGES * PAGE_SIZE);
dprintf("virt_addr %p\n", mbox.virt_addr);
if ((unsigned long)mbox.virt_addr & (PAGE_SIZE-1))
fatal("pi-blaster: Virtual address is not page aligned\n");
/* we are done with the mbox */
mbox_close(mbox.handle);
mbox.handle = -1;
//fatal("TempFatal\n");
init_ctrl_data();
init_hardware();
init_channel_pwm();
// Init pin2gpio array with 0/false values to avoid locking all of them as PWM.
init_pin2gpio();
// Only calls update_pwm after ctrl_data calculates the pin mask to unlock all pins on start.
init_pwm();
unlink(DEVFILE);
if (mkfifo(DEVFILE, 0666) < 0)
fatal("pi-blaster: Failed to create %s: %m\n", DEVFILE);
if (chmod(DEVFILE, 0666) < 0)
fatal("pi-blaster: Failed to set permissions on %s: %m\n", DEVFILE);
printf("Initialised, ");
if (daemonize) {
if (daemon(0,1) < 0)
fatal("pi-blaster: Failed to daemonize process: %m\n");
else
printf("Daemonized, ");
}
printf("Reading %s.\n", DEVFILE);
go_go_go();
return 0;
}
/**
* Allocate and initialize memory, buffers, pages, PWM, DMA, and GPIO.
*
* @param ws2811 ws2811 instance pointer.
*
* @returns 0 on success, -1 otherwise.
*/
int ws2811_init(ws2811_t *ws2811)
{
ws2811_device_t *device = NULL;
int chan;
// Zero mbox; non-zero values indicate action needed on cleanup
memset(&mbox, 0, sizeof(mbox));
ws2811->device = malloc(sizeof(*ws2811->device));
if (!ws2811->device)
{
return -1;
}
device = ws2811->device;
// Determine how much physical memory we need for DMA
mbox.size = PWM_BYTE_COUNT(max_channel_led_count(ws2811), ws2811->freq) +
+ sizeof(dma_cb_t);
// Round up to page size multiple
mbox.size = (mbox.size + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1);
// Use the mailbox interface to request memory from the VideoCore
// We specifiy (-1) for the handle rather than calling mbox_open()
// so multiple users can share the resource.
mbox.handle = -1; // mbox_open();
mbox.mem_ref = mem_alloc(mbox.handle, mbox.size, PAGE_SIZE,
board_info_sdram_address() == 0x40000000 ? 0xC : 0x4);
if (mbox.mem_ref == (unsigned) ~0)
{
return -1;
}
mbox.bus_addr = mem_lock(mbox.handle, mbox.mem_ref);
if (mbox.bus_addr == (unsigned) ~0)
{
mem_free(mbox.handle, mbox.size);
return -1;
}
mbox.virt_addr = mapmem(BUS_TO_PHYS(mbox.bus_addr), mbox.size);
// Initialize all pointers to NULL. Any non-NULL pointers will be freed on cleanup.
device->pwm_raw = NULL;
device->dma_cb = NULL;
for (chan = 0; chan < RPI_PWM_CHANNELS; chan++)
{
ws2811->channel[chan].leds = NULL;
}
// Allocate the LED buffers
for (chan = 0; chan < RPI_PWM_CHANNELS; chan++)
{
ws2811_channel_t *channel = &ws2811->channel[chan];
channel->leds = malloc(sizeof(ws2811_led_t) * channel->count);
if (!channel->leds)
{
goto err;
}
memset(channel->leds, 0, sizeof(ws2811_led_t) * channel->count);
}
device->dma_cb = (dma_cb_t *)mbox.virt_addr;
device->pwm_raw = (uint8_t *)mbox.virt_addr + sizeof(dma_cb_t);
pwm_raw_init(ws2811);
memset((dma_cb_t *)device->dma_cb, 0, sizeof(dma_cb_t));
// Cache the DMA control block bus address
device->dma_cb_addr = addr_to_bus(device->dma_cb);
// Map the physical registers into userspace
if (map_registers(ws2811))
{
goto err;
}
// Initialize the GPIO pins
if (gpio_init(ws2811))
{
unmap_registers(ws2811);
goto err;
}
// Setup the PWM, clocks, and DMA
if (setup_pwm(ws2811))
{
unmap_registers(ws2811);
goto err;
}
return 0;
err:
ws2811_cleanup(ws2811);
return -1;
}
char InitDma(void *FunctionTerminate)
{
DMA_CHANNEL=4;
if (system("rm -f linuxversion.txt") != 0) {
fprintf(stderr, "rm failed\n");
}
if (system("uname -r >> linuxversion.txt") != 0) {
fprintf(stderr, "uname failed\n");
}
char *line = NULL;
size_t size;
// int fLinux=open("Flinuxversion.txt", "r');
FILE * flinux=fopen("linuxversion.txt", "r");
if (getline(&line, &size, flinux) == -1)
{
printf("Could no get Linux version\n");
}
else
{
if(line[0]=='3')
{
printf("Wheezy\n");
DMA_CHANNEL=DMA_CHANNEL_WHEEZY;
}
if(line[0]=='4')
{
printf("Jessie\n");
DMA_CHANNEL=DMA_CHANNEL_JESSIE;
}
}
//printf("Init DMA\n");
// Catch all signals possible - it is vital we kill the DMA engine
// on process exit!
int i;
for (i = 0; i < 64; i++) {
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = FunctionTerminate;//terminate;
sigaction(i, &sa, NULL);
}
//NUM_SAMPLES = NUM_SAMPLES_MAX;
/* Use the mailbox interface to the VC to ask for physical memory */
/*
unlink(MBFILE);
if (mknod(MBFILE, S_IFCHR|0600, makedev(100, 0)) < 0)
{
printf("Failed to create mailbox device\n");
return 0;
}*/
mbox.handle = mbox_open();
if (mbox.handle < 0)
{
printf("Failed to open mailbox\n");
return(0);
}
mbox.mem_ref = mem_alloc(mbox.handle, NUM_PAGES* PAGE_SIZE, PAGE_SIZE, mem_flag);
/* TODO: How do we know that succeeded? */
//printf("mem_ref %x\n", mbox.mem_ref);
mbox.bus_addr = mem_lock(mbox.handle, mbox.mem_ref);
//printf("bus_addr = %x\n", mbox.bus_addr);
mbox.virt_addr = mapmem(BUS_TO_PHYS(mbox.bus_addr), NUM_PAGES* PAGE_SIZE);
//printf("virt_addr %p\n", mbox.virt_addr);
virtbase = (uint8_t *)((uint32_t *)mbox.virt_addr);
//printf("virtbase %p\n", virtbase);
return(1);
}
/**
* Allocate and initialize memory, buffers, pages, PWM, DMA, and GPIO.
*
* @param ws2811 ws2811 instance pointer.
*
* @returns 0 on success, -1 otherwise.
*/
int ws2811_init(ws2811_t *ws2811)
{
ws2811_device_t *device;
const rpi_hw_t *rpi_hw;
int chan;
ws2811->rpi_hw = rpi_hw_detect();
if (!ws2811->rpi_hw)
{
return -1;
}
rpi_hw = ws2811->rpi_hw;
ws2811->device = malloc(sizeof(*ws2811->device));
if (!ws2811->device)
{
return -1;
}
device = ws2811->device;
// Determine how much physical memory we need for DMA
device->mbox.size = PWM_BYTE_COUNT(max_channel_led_count(ws2811), ws2811->freq) +
sizeof(dma_cb_t);
// Round up to page size multiple
device->mbox.size = (device->mbox.size + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
device->mbox.handle = mbox_open();
if (device->mbox.handle == -1)
{
return -1;
}
device->mbox.mem_ref = mem_alloc(device->mbox.handle, device->mbox.size, PAGE_SIZE,
rpi_hw->videocore_base == 0x40000000 ? 0xC : 0x4);
if (device->mbox.mem_ref == 0)
{
return -1;
}
device->mbox.bus_addr = mem_lock(device->mbox.handle, device->mbox.mem_ref);
if (device->mbox.bus_addr == (uint32_t) ~0UL)
{
mem_free(device->mbox.handle, device->mbox.size);
return -1;
}
device->mbox.virt_addr = mapmem(BUS_TO_PHYS(device->mbox.bus_addr), device->mbox.size);
// Initialize all pointers to NULL. Any non-NULL pointers will be freed on cleanup.
device->pwm_raw = NULL;
device->dma_cb = NULL;
for (chan = 0; chan < RPI_PWM_CHANNELS; chan++)
{
ws2811->channel[chan].leds = NULL;
}
// Allocate the LED buffers
for (chan = 0; chan < RPI_PWM_CHANNELS; chan++)
{
ws2811_channel_t *channel = &ws2811->channel[chan];
channel->leds = malloc(sizeof(ws2811_led_t) * channel->count);
if (!channel->leds)
{
goto err;
}
memset(channel->leds, 0, sizeof(ws2811_led_t) * channel->count);
if (!channel->strip_type)
{
channel->strip_type=WS2811_STRIP_RGB;
}
}
device->dma_cb = (dma_cb_t *)device->mbox.virt_addr;
device->pwm_raw = (uint8_t *)device->mbox.virt_addr + sizeof(dma_cb_t);
pwm_raw_init(ws2811);
memset((dma_cb_t *)device->dma_cb, 0, sizeof(dma_cb_t));
// Cache the DMA control block bus address
device->dma_cb_addr = addr_to_bus(device, device->dma_cb);
// Map the physical registers into userspace
if (map_registers(ws2811))
{
goto err;
}
// Initialize the GPIO pins
if (gpio_init(ws2811))
{
unmap_registers(ws2811);
goto err;
}
// Setup the PWM, clocks, and DMA
if (setup_pwm(ws2811))
{
unmap_registers(ws2811);
goto err;
}
return 0;
err:
ws2811_cleanup(ws2811);
return -1;
}
int
EtherInit(unsigned char *myadr)
{
uint32_t pcicsr;
uint16_t val;
volatile struct ex_upd *upd;
#ifndef _STANDALONE
uint32_t id;
#endif
if (pcicheck()) {
printf("pcicheck failed\n");
return 0;
}
#ifndef _STANDALONE
pcicfgread(&mytag, 0, &id);
#endif
for (excard = &excards[0]; excard->did != -1; excard++) {
#ifdef _STANDALONE
if (pcifinddev(0x10b7, excard->did, &mytag) == 0)
goto found;
#else
if (id == (0x10b7 | (excard->did << 16)))
goto found;
#endif
}
printf("no ex\n");
return 0;
found:
pcicfgread(&mytag, 0x10, &iobase);
iobase &= ~3;
#ifndef _STANDALONE
dmamem = mapmem(DMABASE, DMASIZE);
if (!dmamem)
return 0;
#endif
/* enable bus mastering in PCI command register */
if (pcicfgread(&mytag, 0x04, (int *)&pcicsr)
|| pcicfgwrite(&mytag, 0x04, pcicsr | 4)) {
printf("cannot enable DMA\n");
return 0;
}
ex_reset();
if (excard->mii)
ether_medium = ETHERMEDIUM_MII;
else {
ex_probemedia();
if (ether_medium < 0)
return 0;
}
val = ex_read_eeprom(EEPROM_OEM_ADDR0);
myethaddr[0] = val >> 8;
myethaddr[1] = val & 0xff;
val = ex_read_eeprom(EEPROM_OEM_ADDR1);
myethaddr[2] = val >> 8;
myethaddr[3] = val & 0xff;
val = ex_read_eeprom(EEPROM_OEM_ADDR2);
myethaddr[4] = val >> 8;
myethaddr[5] = val & 0xff;
memcpy(myadr, myethaddr, 6);
upd = RECVBUF_VIRT;
upd->upd_nextptr = RECVBUF_PHYS;
upd->upd_pktstatus = 1500;
upd->upd_frags[0].fr_addr = RECVBUF_PHYS + 100;
upd->upd_frags[0].fr_len = 1500 | EX_FR_LAST;
ex_init();
#if defined(_STANDALONE) && !defined(SUPPORT_NO_NETBSD)
strncpy(bi_netif.ifname, "ex", sizeof(bi_netif.ifname));
bi_netif.bus = BI_BUS_PCI;
bi_netif.addr.tag = mytag;
BI_ADD(&bi_netif, BTINFO_NETIF, sizeof(bi_netif));
#endif
return 1;
}
int main(int argc, char *argv[]) {
int mb = mbox_open();
/* Enable QPU for execution */
int qpu_enabled = !qpu_enable(mb, 1);
if (!qpu_enabled) {
printf("Unable to enable QPU. Check your firmware is latest.");
goto cleanup;
}
/* Allocate GPU memory and map it into ARM address space */
unsigned size = 4096;
unsigned align = 4096;
unsigned handle = mem_alloc(mb, size, align, GPU_MEM_FLG);
if (!handle) {
printf("Failed to allocate GPU memory.");
goto cleanup;
}
void *gpu_pointer = (void *)mem_lock(mb, handle);
void *arm_pointer = mapmem((unsigned)gpu_pointer+GPU_MEM_MAP, size);
unsigned *p = (unsigned *)arm_pointer;
/*
+---------------+ <----+
| QPU Code | |
| ... | |
+---------------+ <--+ |
| Uniforms | | |
+---------------+ | |
| QPU0 Uniform -----+ |
| QPU0 Start -------+
| ... |
| QPUn Uniform |
| QPUn PC -------+
+---------------+
*/
/* Copy QPU program into GPU memory */
unsigned *qpu_code = p;
memcpy(p, program, sizeof program);
p += (sizeof program)/(sizeof program[0]);
/* Build Uniforms */
unsigned *qpu_uniform = p;
*p++ = 1;
/* Build QPU Launch messages */
unsigned *qpu_msg = p;
*p++ = as_gpu_address(qpu_uniform);
*p++ = as_gpu_address(qpu_code);
int i;
for (i=0; i<16+1+2; i++) {
printf("%08x: %08x\n", gpu_pointer+i*4, ((unsigned *)arm_pointer)[i]);
}
printf("qpu exec %08x\n", gpu_pointer + ((void *)qpu_msg - arm_pointer));
/* Launch QPU program and block till its done */
unsigned r = execute_qpu(mb, GPU_QPUS, as_gpu_address(qpu_msg), 1, 10000);
printf("%d\n", r);
cleanup:
/* Release GPU memory */
if (arm_pointer) {
unmapmem(arm_pointer, size);
}
if (handle) {
mem_unlock(mb, handle);
mem_free(mb, handle);
}
/* Release QPU */
if (qpu_enabled) {
qpu_enable(mb, 0);
}
/* Release mailbox */
mbox_close(mb);
}
// Initialise this library.
int bcm2835_init(void)
{
struct timeval tv ;
if (debug)
{
bcm2835_peripherals = (uint32_t*)BCM2835_PERI_BASE;
bcm2835_pads = bcm2835_peripherals + BCM2835_GPIO_PADS;
bcm2835_clk = bcm2835_peripherals + BCM2835_CLOCK_BASE;
bcm2835_gpio = bcm2835_peripherals + BCM2835_GPIO_BASE;
bcm2835_pwm = bcm2835_peripherals + BCM2835_GPIO_PWM;
bcm2835_spi0 = bcm2835_peripherals + BCM2835_SPI0_BASE;
bcm2835_bsc0 = bcm2835_peripherals + BCM2835_BSC0_BASE;
bcm2835_bsc1 = bcm2835_peripherals + BCM2835_BSC1_BASE;
bcm2835_st = bcm2835_peripherals + BCM2835_ST_BASE;
return 1; // Success
}
// Figure out the base and size of the peripheral address block, based on whether we are on a RPI2 or not,
// using the device-tree
FILE *fp = fopen(BMC2835_RPI2_DT_FILENAME , "rb");
if (fp)
{
unsigned char buf[4];
fseek(fp, BMC2835_RPI2_DT_PERI_BASE_ADDRESS_OFFSET, SEEK_SET);
if (fread(buf, 1, sizeof(buf), fp) == sizeof(buf))
bcm2835_peripherals_base = (uint32_t *)(buf[0] << 24 | buf[1] << 16 | buf[2] << 8 | buf[3] << 0);
fseek(fp, BMC2835_RPI2_DT_PERI_SIZE_OFFSET, SEEK_SET);
if (fread(buf, 1, sizeof(buf), fp) == sizeof(buf))
bcm2835_peripherals_size = (buf[0] << 24 | buf[1] << 16 | buf[2] << 8 | buf[3] << 0);
fclose(fp);
}
// else we are prob on RPi 1 with BCM2835, and use the hardwired defaults
// Now get ready to map the peripherals block
int memfd = -1;
int ok = 0;
// Open the master /dev/memory device
if ((memfd = open("/dev/mem", O_RDWR | O_SYNC) ) < 0)
{
fprintf(stderr, "bcm2835_init: Unable to open /dev/mem: %s\n",
strerror(errno)) ;
goto exit;
}
// Base of the peripherals block is mapped to VM
bcm2835_peripherals = (uint32_t *)mapmem("gpio", bcm2835_peripherals_size, memfd, (uint32_t)bcm2835_peripherals_base);
if (bcm2835_peripherals == MAP_FAILED) goto exit;
// Now compute the base addresses of various peripherals, which are at fixed offsets within the mapped peripherals block
bcm2835_gpio = bcm2835_peripherals + BCM2835_GPIO_BASE;
bcm2835_pwm = bcm2835_peripherals + BCM2835_GPIO_PWM;
bcm2835_clk = bcm2835_peripherals + BCM2835_CLOCK_BASE;
bcm2835_pads = bcm2835_peripherals + BCM2835_GPIO_PADS;
bcm2835_spi0 = bcm2835_peripherals + BCM2835_SPI0_BASE;
bcm2835_bsc0 = bcm2835_peripherals + BCM2835_BSC0_BASE; // I2C
bcm2835_bsc1 = bcm2835_peripherals + BCM2835_BSC1_BASE; // I2C
bcm2835_st = bcm2835_peripherals + BCM2835_ST_BASE;
ok = 1;
exit:
if (memfd >= 0)
close(memfd);
if (!ok)
bcm2835_close();
gettimeofday (&tv, NULL) ;
epoch = (tv.tv_sec * 1000000 + tv.tv_usec) / 1000 ;
return ok;
}
// Render a single triangle to memory.
void testTriangle() {
// Like above, we allocate/lock/map some videocore memory
// I'm just shoving everything in a single buffer because I'm lazy
// 8Mb, 4k alignment
unsigned int handle = mem_alloc(mbox, 0x800000, 0x1000, MEM_FLAG_COHERENT | MEM_FLAG_ZERO);
if (!handle) {
printf("Error: Unable to allocate memory");
return;
}
uint32_t bus_addr = mem_lock(mbox, handle);
uint8_t *list = (uint8_t*) mapmem(bus_addr, 0x800000);
uint8_t *p = list;
// Configuration stuff
// Tile Binning Configuration.
// Tile state data is 48 bytes per tile, I think it can be thrown away
// as soon as binning is finished.
addbyte(&p, 112);
addword(&p, bus_addr + 0x6200); // tile allocation memory address
addword(&p, 0x8000); // tile allocation memory size
addword(&p, bus_addr + 0x100); // Tile state data address
addbyte(&p, 30); // 1920/64
addbyte(&p, 17); // 1080/64 (16.875)
addbyte(&p, 0x04); // config
// Start tile binning.
addbyte(&p, 6);
// Primitive type
addbyte(&p, 56);
addbyte(&p, 0x32); // 16 bit triangle
// Clip Window
addbyte(&p, 102);
addshort(&p, 0);
addshort(&p, 0);
addshort(&p, 1920); // width
addshort(&p, 1080); // height
// State
addbyte(&p, 96);
addbyte(&p, 0x03); // enable both foward and back facing polygons
addbyte(&p, 0x00); // depth testing disabled
addbyte(&p, 0x02); // enable early depth write
// Viewport offset
addbyte(&p, 103);
addshort(&p, 0);
addshort(&p, 0);
// The triangle
// No Vertex Shader state (takes pre-transformed vertexes,
// so we don't have to supply a working coordinate shader to test the binner.
addbyte(&p, 65);
addword(&p, bus_addr + 0x80); // Shader Record
// primitive index list
addbyte(&p, 32);
addbyte(&p, 0x04); // 8bit index, trinagles
addword(&p, 3); // Length
addword(&p, bus_addr + 0x70); // address
addword(&p, 2); // Maximum index
// End of bin list
// Flush
addbyte(&p, 5);
// Nop
addbyte(&p, 1);
// Halt
addbyte(&p, 0);
int length = p - list;
assert(length < 0x80);
// Shader Record
p = list + 0x80;
addbyte(&p, 0x01); // flags
addbyte(&p, 6*4); // stride
addbyte(&p, 0xcc); // num uniforms (not used)
addbyte(&p, 3); // num varyings
addword(&p, bus_addr + 0xfe00); // Fragment shader code
addword(&p, bus_addr + 0xff00); // Fragment shader uniforms
addword(&p, bus_addr + 0xa0); // Vertex Data
// Vertex Data
p = list + 0xa0;
// Vertex: Top, red
addshort(&p, (1920/2) << 4); // X in 12.4 fixed point
addshort(&p, 200 << 4); // Y in 12.4 fixed point
addfloat(&p, 1.0f); // Z
addfloat(&p, 1.0f); // 1/W
addfloat(&p, 1.0f); // Varying 0 (Red)
addfloat(&p, 0.0f); // Varying 1 (Green)
addfloat(&p, 0.0f); // Varying 2 (Blue)
// Vertex: bottom left, Green
addshort(&p, 560 << 4); // X in 12.4 fixed point
addshort(&p, 800 << 4); // Y in 12.4 fixed point
addfloat(&p, 1.0f); // Z
addfloat(&p, 1.0f); // 1/W
addfloat(&p, 0.0f); // Varying 0 (Red)
addfloat(&p, 1.0f); // Varying 1 (Green)
addfloat(&p, 0.0f); // Varying 2 (Blue)
// Vertex: bottom right, Blue
addshort(&p, 1360 << 4); // X in 12.4 fixed point
addshort(&p, 800 << 4); // Y in 12.4 fixed point
addfloat(&p, 1.0f); // Z
addfloat(&p, 1.0f); // 1/W
addfloat(&p, 0.0f); // Varying 0 (Red)
addfloat(&p, 0.0f); // Varying 1 (Green)
addfloat(&p, 1.0f); // Varying 2 (Blue)
// Vertex list
p = list + 0x70;
addbyte(&p, 0); // top
addbyte(&p, 1); // bottom left
addbyte(&p, 2); // bottom right
// fragment shader
p = list + 0xfe00;
addword(&p, 0x958e0dbf);
addword(&p, 0xd1724823); /* mov r0, vary; mov r3.8d, 1.0 */
addword(&p, 0x818e7176);
addword(&p, 0x40024821); /* fadd r0, r0, r5; mov r1, vary */
addword(&p, 0x818e7376);
addword(&p, 0x10024862); /* fadd r1, r1, r5; mov r2, vary */
addword(&p, 0x819e7540);
addword(&p, 0x114248a3); /* fadd r2, r2, r5; mov r3.8a, r0 */
addword(&p, 0x809e7009);
addword(&p, 0x115049e3); /* nop; mov r3.8b, r1 */
addword(&p, 0x809e7012);
addword(&p, 0x116049e3); /* nop; mov r3.8c, r2 */
addword(&p, 0x159e76c0);
addword(&p, 0x30020ba7); /* mov tlbc, r3; nop; thrend */
addword(&p, 0x009e7000);
addword(&p, 0x100009e7); /* nop; nop; nop */
addword(&p, 0x009e7000);
addword(&p, 0x500009e7); /* nop; nop; sbdone */
// Render control list
p = list + 0xe200;
// Clear color
addbyte(&p, 114);
addword(&p, 0xff000000); // Opaque Black
addword(&p, 0xff000000); // 32 bit clear colours need to be repeated twice
addword(&p, 0);
addbyte(&p, 0);
// Tile Rendering Mode Configuration
addbyte(&p, 113);
addword(&p, bus_addr + 0x10000); // framebuffer addresss
addshort(&p, 1920); // width
addshort(&p, 1080); // height
addbyte(&p, 0x04); // framebuffer mode (linear rgba8888)
addbyte(&p, 0x00);
// Do a store of the first tile to force the tile buffer to be cleared
// Tile Coordinates
addbyte(&p, 115);
addbyte(&p, 0);
addbyte(&p, 0);
// Store Tile Buffer General
addbyte(&p, 28);
addshort(&p, 0); // Store nothing (just clear)
addword(&p, 0); // no address is needed
// Link all binned lists together
for(int x = 0; x < 30; x++) {
for(int y = 0; y < 17; y++) {
// Tile Coordinates
addbyte(&p, 115);
addbyte(&p, x);
addbyte(&p, y);
// Call Tile sublist
addbyte(&p, 17);
addword(&p, bus_addr + 0x6200 + (y * 30 + x) * 32);
// Last tile needs a special store instruction
if(x == 29 && y == 16) {
// Store resolved tile color buffer and signal end of frame
addbyte(&p, 25);
} else {
// Store resolved tile color buffer
addbyte(&p, 24);
}
}
}
int render_length = p - (list + 0xe200);
// Run our control list
printf("Binner control list constructed\n");
printf("Start Address: 0x%08x, length: 0x%x\n", bus_addr, length);
v3d[V3D_CT0CA] = bus_addr;
v3d[V3D_CT0EA] = bus_addr + length;
printf("V3D_CT0CS: 0x%08x, Address: 0x%08x\n", v3d[V3D_CT0CS], v3d[V3D_CT0CA]);
// Wait for control list to execute
while(v3d[V3D_CT0CS] & 0x20);
printf("V3D_CT0CS: 0x%08x, Address: 0x%08x\n", v3d[V3D_CT0CS], v3d[V3D_CT0CA]);
printf("V3D_CT1CS: 0x%08x, Address: 0x%08x\n", v3d[V3D_CT1CS], v3d[V3D_CT1CA]);
v3d[V3D_CT1CA] = bus_addr + 0xe200;
v3d[V3D_CT1EA] = bus_addr + 0xe200 + render_length;
while(v3d[V3D_CT1CS] & 0x20);
printf("V3D_CT1CS: 0x%08x, Address: 0x%08x\n", v3d[V3D_CT1CS], v3d[V3D_CT1CA]);
v3d[V3D_CT1CS] = 0x20;
// just dump the frame to a file
FILE *f = fopen("frame.data", "w");
fwrite(list + 0x10000, (1920*1080*4), 1, f);
fclose(f);
printf("frame buffer memory dumpped to frame.data\n");
// Release resources
unmapmem((void *) list, 0x800000);
mem_unlock(mbox, handle);
mem_free(mbox, handle);
}
int
main(int argc, char **argv)
{
int fd;
int ac;
isdn_ioctl_struct ioctl_s;
isdnloop_cdef newcard;
isdnloop_sdef startparm;
cmd = strrchr(argv[0], '/');
cmd = (cmd == NULL) ? argv[0] : cmd + 1;
if (argc > 1) {
if (!strcmp(argv[1], "-d")) {
strcpy(ioctl_s.drvid, argv[2]);
arg_ofs = 3;
} else {
ioctl_s.drvid[0] = '\0';
arg_ofs = 1;
}
} else
usage();
ac = argc - (arg_ofs - 1);
fd = open("/dev/isdnctrl", O_RDWR);
if (fd < 0) {
perror(ctrldev);
exit(-1);
}
#ifdef __DEBUGVAR__
if (!strcmp(argv[arg_ofs], "dump")) {
char *p;
ioctl_s.arg = (ulong) & dbg;
if ((ioctl(fd, ISDNLOOP_IOCTL_DEBUGVAR + IIOCDRVCTL, &ioctl_s)) < 0) {
perror("ioctl DEBUGVAR");
exit(-1);
}
close(fd);
p = mapmem(dbg.dev, sizeof(icn_dev));
dump_dev((icn_dev *) p);
p = mapmem(dbg.card, sizeof(icn_card));
dump_card((icn_card *) p);
return 0;
}
#endif
if (!strcmp(argv[arg_ofs], "leased")) {
if (ac == 3) {
ioctl_s.arg = 0;
if ((!strcmp(argv[arg_ofs + 1], "on")) ||
(!strcmp(argv[arg_ofs + 1], "yes")))
ioctl_s.arg = 1;
if ((ioctl(fd, ISDNLOOP_IOCTL_LEASEDCFG + IIOCDRVCTL, &ioctl_s)) < 0) {
perror("ioctl LEASEDCFG");
exit(-1);
}
close(fd);
return 0;
}
}
if (!strcmp(argv[arg_ofs], "add")) {
if (ac >= 2) {
ioctl_s.arg = (unsigned long) &newcard;
newcard.id1[0] = 0;
strncpy(newcard.id1, argv[arg_ofs + 1], sizeof(newcard.id1) - 1);
if ((ioctl(fd, ISDNLOOP_IOCTL_ADDCARD + IIOCDRVCTL, &ioctl_s)) < 0) {
perror("ioctl ADDCARD");
exit(-1);
}
close(fd);
return 0;
}
}
if (!strcmp(argv[arg_ofs], "start")) {
int needed = 99;
if (ac > 2) {
if (!(strcmp(argv[arg_ofs + 1], "1tr6"))) {
needed = 4;
startparm.ptype = ISDN_PTYPE_1TR6;
}
if (!(strcmp(argv[arg_ofs + 1], "dss1"))) {
needed = 6;
startparm.ptype = ISDN_PTYPE_EURO;
}
if (ac >= needed) {
strcpy(startparm.num[0], argv[arg_ofs + 2]);
if (needed > 4) {
strcpy(startparm.num[1], argv[arg_ofs + 3]);
strcpy(startparm.num[2], argv[arg_ofs + 4]);
}
ioctl_s.arg = (unsigned long) &startparm;
if (ioctl(fd, ISDNLOOP_IOCTL_STARTUP + IIOCDRVCTL, &ioctl_s) < 0) {
perror("\nioctl STARTUP");
exit(-1);
}
printf("done\n");
close(fd);
return 0;
}
}
usage();
}
usage();
return 0;
}
// Initialise this library.
int bcm2835_init(void)
{
if (debug)
{
bcm2835_pads = (uint32_t*)BCM2835_GPIO_PADS;
bcm2835_clk = (uint32_t*)BCM2835_CLOCK_BASE;
bcm2835_gpio = (uint32_t*)BCM2835_GPIO_BASE;
bcm2835_pwm = (uint32_t*)BCM2835_GPIO_PWM;
bcm2835_spi0 = (uint32_t*)BCM2835_SPI0_BASE;
bcm2835_bsc0 = (uint32_t*)BCM2835_BSC0_BASE;
bcm2835_bsc1 = (uint32_t*)BCM2835_BSC1_BASE;
bcm2835_st = (uint32_t*)BCM2835_ST_BASE;
return 1; // Success
}
int memfd = -1;
int ok = 0;
// Open the master /dev/memory device
if ((memfd = open("/dev/mem", O_RDWR | O_SYNC) ) < 0)
{
fprintf(stderr, "bcm2835_init: Unable to open /dev/mem: %s\n",
strerror(errno)) ;
goto exit;
}
// GPIO:
bcm2835_gpio = (volatile uint32_t *)mapmem("gpio", BCM2835_BLOCK_SIZE, memfd, BCM2835_GPIO_BASE);
if (bcm2835_gpio == MAP_FAILED) goto exit;
// PWM
bcm2835_pwm = (volatile uint32_t *)mapmem("pwm", BCM2835_BLOCK_SIZE, memfd, BCM2835_GPIO_PWM);
if (bcm2835_pwm == MAP_FAILED) goto exit;
// Clock control (needed for PWM)
bcm2835_clk = (volatile uint32_t *)mapmem("clk", BCM2835_BLOCK_SIZE, memfd, BCM2835_CLOCK_BASE);
if (bcm2835_clk == MAP_FAILED) goto exit;
bcm2835_pads = (volatile uint32_t *)mapmem("pads", BCM2835_BLOCK_SIZE, memfd, BCM2835_GPIO_PADS);
if (bcm2835_pads == MAP_FAILED) goto exit;
bcm2835_spi0 = (volatile uint32_t *)mapmem("spi0", BCM2835_BLOCK_SIZE, memfd, BCM2835_SPI0_BASE);
if (bcm2835_spi0 == MAP_FAILED) goto exit;
// I2C
bcm2835_bsc0 = (volatile uint32_t *)mapmem("bsc0", BCM2835_BLOCK_SIZE, memfd, BCM2835_BSC0_BASE);
if (bcm2835_bsc0 == MAP_FAILED) goto exit;
bcm2835_bsc1 = (volatile uint32_t *)mapmem("bsc1", BCM2835_BLOCK_SIZE, memfd, BCM2835_BSC1_BASE);
if (bcm2835_bsc1 == MAP_FAILED) goto exit;
// ST
bcm2835_st = (volatile uint32_t *)mapmem("st", BCM2835_BLOCK_SIZE, memfd, BCM2835_ST_BASE);
if (bcm2835_st == MAP_FAILED) goto exit;
ok = 1;
exit:
if (memfd >= 0)
close(memfd);
if (!ok)
bcm2835_close();
return ok;
}
int tx(uint32_t carrier_freq, char *audio_file, uint16_t pi, char *ps, char *rt, float ppm, char *control_pipe) {
// Catch all signals possible - it is vital we kill the DMA engine
// on process exit!
for (int i = 0; i < 64; i++) {
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = terminate;
sigaction(i, &sa, NULL);
}
dma_reg = map_peripheral(DMA_VIRT_BASE, DMA_LEN);
pwm_reg = map_peripheral(PWM_VIRT_BASE, PWM_LEN);
clk_reg = map_peripheral(CLK_VIRT_BASE, CLK_LEN);
gpio_reg = map_peripheral(GPIO_VIRT_BASE, GPIO_LEN);
// Use the mailbox interface to the VC to ask for physical memory.
mbox.handle = mbox_open();
if (mbox.handle < 0)
fatal("Failed to open mailbox. Check kernel support for vcio / BCM2708 mailbox.\n");
printf("Allocating physical memory: size = %d ", NUM_PAGES * 4096);
if(! (mbox.mem_ref = mem_alloc(mbox.handle, NUM_PAGES * 4096, 4096, MEM_FLAG))) {
fatal("Could not allocate memory.\n");
}
// TODO: How do we know that succeeded?
printf("mem_ref = %u ", mbox.mem_ref);
if(! (mbox.bus_addr = mem_lock(mbox.handle, mbox.mem_ref))) {
fatal("Could not lock memory.\n");
}
printf("bus_addr = %x ", mbox.bus_addr);
if(! (mbox.virt_addr = mapmem(BUS_TO_PHYS(mbox.bus_addr), NUM_PAGES * 4096))) {
fatal("Could not map memory.\n");
}
printf("virt_addr = %p\n", mbox.virt_addr);
// GPIO4 needs to be ALT FUNC 0 to output the clock
gpio_reg[GPFSEL0] = (gpio_reg[GPFSEL0] & ~(7 << 12)) | (4 << 12);
// Program GPCLK to use MASH setting 1, so fractional dividers work
clk_reg[GPCLK_CNTL] = 0x5A << 24 | 6;
udelay(100);
clk_reg[GPCLK_CNTL] = 0x5A << 24 | 1 << 9 | 1 << 4 | 6;
ctl = (struct control_data_s *) mbox.virt_addr;
dma_cb_t *cbp = ctl->cb;
uint32_t phys_sample_dst = CM_GP0DIV;
uint32_t phys_pwm_fifo_addr = PWM_PHYS_BASE + 0x18;
// Calculate the frequency control word
// The fractional part is stored in the lower 12 bits
uint32_t freq_ctl = ((float)(PLLFREQ / carrier_freq)) * ( 1 << 12 );
for (int i = 0; i < NUM_SAMPLES; i++) {
ctl->sample[i] = 0x5a << 24 | freq_ctl; // Silence
// Write a frequency sample
cbp->info = BCM2708_DMA_NO_WIDE_BURSTS | BCM2708_DMA_WAIT_RESP;
cbp->src = mem_virt_to_phys(ctl->sample + i);
cbp->dst = phys_sample_dst;
cbp->length = 4;
cbp->stride = 0;
cbp->next = mem_virt_to_phys(cbp + 1);
cbp++;
// Delay
cbp->info = BCM2708_DMA_NO_WIDE_BURSTS | BCM2708_DMA_WAIT_RESP | BCM2708_DMA_D_DREQ | BCM2708_DMA_PER_MAP(5);
cbp->src = mem_virt_to_phys(mbox.virt_addr);
cbp->dst = phys_pwm_fifo_addr;
cbp->length = 4;
cbp->stride = 0;
cbp->next = mem_virt_to_phys(cbp + 1);
cbp++;
}
cbp--;
cbp->next = mem_virt_to_phys(mbox.virt_addr);
// Here we define the rate at which we want to update the GPCLK control
// register.
//
// Set the range to 2 bits. PLLD is at 500 MHz, therefore to get 228 kHz
// we need a divisor of 500000 / 2 / 228 = 1096.491228
//
// This is 1096 + 2012*2^-12 theoretically
//
// However the fractional part may have to be adjusted to take the actual
// frequency of your Pi's oscillator into account. For example on my Pi,
// the fractional part should be 1916 instead of 2012 to get exactly
// 228 kHz. However RDS decoding is still okay even at 2012.
//
// So we use the 'ppm' parameter to compensate for the oscillator error
float divider = (500000./(2*228*(1.+ppm/1.e6)));
uint32_t idivider = (uint32_t) divider;
uint32_t fdivider = (uint32_t) ((divider - idivider)*pow(2, 12));
printf("ppm corr is %.4f, divider is %.4f (%d + %d*2^-12) [nominal 1096.4912].\n",
ppm, divider, idivider, fdivider);
pwm_reg[PWM_CTL] = 0;
udelay(10);
clk_reg[PWMCLK_CNTL] = 0x5A000006; // Source=PLLD and disable
udelay(100);
// theorically : 1096 + 2012*2^-12
clk_reg[PWMCLK_DIV] = 0x5A000000 | (idivider<<12) | fdivider;
udelay(100);
clk_reg[PWMCLK_CNTL] = 0x5A000216; // Source=PLLD and enable + MASH filter 1
udelay(100);
pwm_reg[PWM_RNG1] = 2;
udelay(10);
pwm_reg[PWM_DMAC] = PWMDMAC_ENAB | PWMDMAC_THRSHLD;
udelay(10);
pwm_reg[PWM_CTL] = PWMCTL_CLRF;
udelay(10);
pwm_reg[PWM_CTL] = PWMCTL_USEF1 | PWMCTL_PWEN1;
udelay(10);
// Initialise the DMA
dma_reg[DMA_CS] = BCM2708_DMA_RESET;
udelay(10);
dma_reg[DMA_CS] = BCM2708_DMA_INT | BCM2708_DMA_END;
dma_reg[DMA_CONBLK_AD] = mem_virt_to_phys(ctl->cb);
dma_reg[DMA_DEBUG] = 7; // clear debug error flags
dma_reg[DMA_CS] = 0x10880001; // go, mid priority, wait for outstanding writes
uint32_t last_cb = (uint32_t)ctl->cb;
// Data structures for baseband data
float data[DATA_SIZE];
int data_len = 0;
int data_index = 0;
// Initialize the baseband generator
if(fm_mpx_open(audio_file, DATA_SIZE) < 0) return 1;
// Initialize the RDS modulator
char myps[9] = {0};
set_rds_pi(pi);
set_rds_rt(rt);
uint16_t count = 0;
uint16_t count2 = 0;
int varying_ps = 0;
if(ps) {
set_rds_ps(ps);
printf("PI: %04X, PS: \"%s\".\n", pi, ps);
} else {
printf("PI: %04X, PS: <Varying>.\n", pi);
varying_ps = 1;
}
printf("RT: \"%s\"\n", rt);
// Initialize the control pipe reader
if(control_pipe) {
if(open_control_pipe(control_pipe) == 0) {
printf("Reading control commands on %s.\n", control_pipe);
} else {
printf("Failed to open control pipe: %s.\n", control_pipe);
control_pipe = NULL;
}
}
printf("Starting to transmit on %3.1f MHz.\n", carrier_freq/1e6);
for (;;) {
// Default (varying) PS
if(varying_ps) {
if(count == 512) {
snprintf(myps, 9, "%08d", count2);
set_rds_ps(myps);
count2++;
}
if(count == 1024) {
set_rds_ps("RPi-Live");
count = 0;
}
count++;
}
if(control_pipe && poll_control_pipe() == CONTROL_PIPE_PS_SET) {
varying_ps = 0;
}
usleep(5000);
uint32_t cur_cb = mem_phys_to_virt(dma_reg[DMA_CONBLK_AD]);
int last_sample = (last_cb - (uint32_t)mbox.virt_addr) / (sizeof(dma_cb_t) * 2);
int this_sample = (cur_cb - (uint32_t)mbox.virt_addr) / (sizeof(dma_cb_t) * 2);
int free_slots = this_sample - last_sample;
if (free_slots < 0)
free_slots += NUM_SAMPLES;
while (free_slots >= SUBSIZE) {
// get more baseband samples if necessary
if(data_len == 0) {
if( fm_mpx_get_samples(data) < 0 ) {
terminate(0);
}
data_len = DATA_SIZE;
data_index = 0;
}
float dval = data[data_index] * (DEVIATION / 10.);
data_index++;
data_len--;
int intval = (int)((floor)(dval));
//int frac = (int)((dval - (float)intval) * SUBSIZE);
ctl->sample[last_sample++] = (0x5A << 24 | freq_ctl) + intval; //(frac > j ? intval + 1 : intval);
if (last_sample == NUM_SAMPLES)
last_sample = 0;
free_slots -= SUBSIZE;
}
last_cb = (uint32_t)mbox.virt_addr + last_sample * sizeof(dma_cb_t) * 2;
}
return 0;
}