void SPIClass::begin() {
int ret =0;
int max_speed = 0, default_mode=0;
int mode;
hw_pinMode(SPI_CS, IO_SPI_FUNC); //CS
hw_pinMode(SPI_MOSI, IO_SPI_FUNC); //MOSI
hw_pinMode(SPI_MISO, IO_SPI_FUNC); //MISO
hw_pinMode(SPI_CLK, IO_SPI_FUNC); //CLK
if (!_fd)
_fd = open(spi_name, O_RDWR);
if (_fd < 0)
pabort("can't open device");
_speed = 500000;
ret = ioctl(_fd, SPI_IOC_RD_MODE, &default_mode);
if (ret == -1)
pabort("can't get spi mode");
mode = default_mode;
ret = ioctl(_fd, SPI_IOC_RD_MAX_SPEED_HZ, &max_speed);
if (ret == -1)
pabort("can't get max speed hz");
_speed = max_speed;
printf("spi mode: 0x%x\n", mode);
printf("bits per word: %d\n", _bits_per_word);
printf("max speed: %d Hz (%d KHz)\n", _speed, _speed/1000);
}
static void transfer_file(int fd, char *filename)
{
ssize_t bytes;
struct stat sb;
int tx_fd;
uint8_t *tx;
uint8_t *rx;
if (stat(filename, &sb) == -1)
pabort("can't stat input file");
tx_fd = open(filename, O_RDONLY);
if (tx_fd < 0)
pabort("can't open input file");
tx = malloc(sb.st_size);
if (!tx)
pabort("can't allocate tx buffer");
rx = malloc(sb.st_size);
if (!rx)
pabort("can't allocate rx buffer");
bytes = read(tx_fd, tx, sb.st_size);
if (bytes != sb.st_size)
pabort("failed to read input file");
transfer(fd, tx, rx, sb.st_size);
free(rx);
free(tx);
close(tx_fd);
}
static void transfer_buf(int fd, int len)
{
uint8_t *tx;
uint8_t *rx;
int i;
tx = malloc(len);
if (!tx)
pabort("can't allocate tx buffer");
for (i = 0; i < len; i++)
tx[i] = random();
rx = malloc(len);
if (!rx)
pabort("can't allocate rx buffer");
transfer(fd, tx, rx, len);
_write_count += len;
_read_count += len;
if (mode & SPI_LOOP) {
if (memcmp(tx, rx, len)) {
fprintf(stderr, "transfer error !\n");
hex_dump(tx, len, 32, "TX");
hex_dump(rx, len, 32, "RX");
exit(1);
}
}
free(rx);
free(tx);
}
static PyObject* directWrite(PyObject* self, PyObject* arg)
{
PyObject* transferTuple;
unsigned int offset, returnVal ;
if(!PyArg_ParseTuple(arg, "lO", &offset, &transferTuple))
return NULL;
if(!PyTuple_Check(transferTuple))
pabort("Only accepts a single tuple as an argument\n");
uint32_t tupleSize = PyTuple_Size(transferTuple);
uint8_t tx[tupleSize];
PyObject* tempItem;
uint32_t i=0;
while(i < tupleSize)
{
tempItem = PyTuple_GetItem(transferTuple, i); //
if(!PyInt_Check(tempItem))
{
pabort("non-integer contained in tuple\n");
}
tx[i] = (uint8_t)PyInt_AsSsize_t(tempItem);
i++;
}
returnVal = direct_write(offset, tx, tupleSize);
return Py_BuildValue("l", returnVal) ;
}
int open_spidev(const char *device, uint8_t mode, uint32_t speed)
{
int spifd, ret;
spifd = open(device, O_RDWR);
if (spifd < 0)
pabort("can't open device");
/*
* spi mode
*/
ret = ioctl(spifd, SPI_IOC_WR_MODE, &mode);
if (ret == -1)
pabort("can't set spi mode");
ret = ioctl(spifd, SPI_IOC_RD_MODE, &mode);
if (ret == -1)
pabort("can't get spi mode");
/*
* max speed hz
*/
ret = ioctl(spifd, SPI_IOC_WR_MAX_SPEED_HZ, &speed);
if (ret == -1)
pabort("can't set max speed hz");
ret = ioctl(spifd, SPI_IOC_RD_MAX_SPEED_HZ, &speed);
if (ret == -1)
pabort("can't get max speed hz");
return spifd;
}
static PyObject* transfer(PyObject* self, PyObject* arg)
{
PyObject* transferTuple;
if(!PyArg_ParseTuple(arg, "O", &transferTuple)) // "O" - Gets non-NULL borrowed reference to Python argument.
return NULL; // As far as I can tell, it's mostly just copying arg[0] into transferTuple
// and making sure at least one arg has been passed (I think)
if(!PyTuple_Check(transferTuple)) // The only argument we support is a single tuple.
pabort("Only accepts a single tuple as an argument\n");
uint32_t tupleSize = PyTuple_Size(transferTuple);
uint8_t tx[tupleSize];
uint8_t rx[tupleSize];
PyObject* tempItem;
uint16_t i=0;
while(i < tupleSize)
{
tempItem = PyTuple_GetItem(transferTuple, i); //
if(!PyInt_Check(tempItem))
{
pabort("non-integer contained in tuple\n");
}
tx[i] = (uint8_t)PyInt_AsSsize_t(tempItem);
i++;
}
struct spi_ioc_transfer tr = {
.tx_buf = (unsigned long)tx,
.rx_buf = (unsigned long)rx,
.len = tupleSize,
.delay_usecs = delay,
.speed_hz = speed,
.bits_per_word = bits,
.cs_change = 1,
};
ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
if (ret < 1)
pabort("can't send spi message");
transferTuple = PyTuple_New(tupleSize);
for(i=0;i<tupleSize;i++)
PyTuple_SetItem(transferTuple, i, Py_BuildValue("i",rx[i]));
return transferTuple;
}
static PyObject* closeSPI(PyObject* self,PyObject* args)
{
close(fd);
Py_RETURN_NONE;
}
/**
* @brief spi read operation function.
*
* @param[in] fd spi file descriptor
* @param[in] reg spi slave register address to be read
* @param[out] value read back data
* @retval void
*
*/
void snowleo_spi_custom_read(int fd, uint8_t *reg, uint8_t *data, uint8_t data_size)
{
int ret;
#if 0
struct spi_ioc_transfer tr[2];
memset(tr, 0, sizeof(tr));
tr[0].tx_buf = (unsigned long)reg;
tr[0].len = data_size;
tr[1].rx_buf = (unsigned long)data;
tr[1].len = data_size;
ret = ioctl(fd, SPI_IOC_MESSAGE(2), &tr);
if (ret < 1)
pabort("can't send spi message");
#else
struct spi_ioc_transfer tr1[2];
memset(tr1, 0, sizeof(tr1));
int i = 0;
for(i = 0; i< data_size; i++){
tr1[0].tx_buf = (unsigned long)®[i];
tr1[0].len = 1;
tr1[1].rx_buf = (unsigned long)&data[i];
tr1[1].len = 1;
ret = ioctl(fd, SPI_IOC_MESSAGE(2), tr1);
if (ret < 1)
pabort("can't send spi message");
//printf("reg[0x%x] = 0x%x\n", reg[i], data[i]);
}
#endif
}
char SPIClass::transfer(char val, int transferMode)
{
int ret=0;
char tx = val;
char rx = 0;
unsigned short delay_usecs = 0;
#ifndef SPI_FULL_DUPLEX
struct spi_ioc_transfer tr[2]={0};
if (transferMode == SPI_CONTINUE)
delay_usecs = 0;
else if (transferMode == SPI_LAST)
delay_usecs = 0xAA55;
memset(tr, 0x0, sizeof(tr));
tr[0].tx_buf = (unsigned long)&tx;
tr[0].len = 1;
tr[0].speed_hz = _speed;
tr[0].bits_per_word = _bits_per_word;
tr[0].delay_usecs = delay_usecs;
tr[1].rx_buf = (unsigned long)℞
tr[1].len = 1;
tr[1].speed_hz = _speed;
tr[1].bits_per_word = _bits_per_word;
tr[1].delay_usecs = delay_usecs;
ret = ioctl(_fd, SPI_IOC_MESSAGE(2), tr);
if (ret < 1)
pabort("can't send spi message");
#else
struct spi_ioc_transfer tr;
if (transferMode == SPI_CONTINUE)
delay_usecs = 0;
else if (transferMode == SPI_LAST)
delay_usecs = 0xAA55;
memset(&tr, 0x0, sizeof(spi_ioc_transfer));
tr.tx_buf = (unsigned long)&tx;
tr.rx_buf = (unsigned long)℞
tr.len = 1;
tr.speed_hz = _speed;
tr.bits_per_word = _bits_per_word;
tr.delay_usecs = delay_usecs;
ret = ioctl(_fd, SPI_IOC_MESSAGE(1), &tr);
if (ret < 1)
pabort("can't send spi message");
#endif
//printf("rx = %.2X \r\n", rx);
return rx;
}
int main(int argc, char *argv[])
{
int ret = 0,cnt =0;
int fd,fds,i,diff =0;
unsigned int dist,prevdist = 0,prev_direction;
struct sigaction act;
fd = open(display, O_RDWR);
if (fd < 0)
pabort("can't open device");
printf("\n initialising....:");
ioctl(fd, SPI_LED_INITIALISE, 0);
transfer(fd);
fds = open(sensor, O_RDWR);
if (fds < 0)
pabort("can't open sensor");
memset (&act, '\0', sizeof(act));
act.sa_sigaction = &terminatehdl;
act.sa_flags = SA_SIGINFO;
if (sigaction(SIGINT, &act,NULL) < 0) {
perror ("sigaction");
return 1;
}
while((!terminate)&&(cnt < 120)){
dist = read(fds,NULL,0);
write(fds,NULL,0);
printf("\ndistance is %lu \n",dist);
diff = dist - prevdist;
if(diff<0)
{
diff = prevdist - dist;
}
if(dist < 40)
{
move_left(fd);
}
else
{
move_right(fd);
}
prevdist = dist;
cnt++;
}
write(fd,NULL,0);
/* time to displat some patterns */
transfer_moves(fd);
anime(fd);
write(fd,NULL,0);
usleep(100000);
close(fd);
close(fds);
return 0;
}
static void transfer(int fd)
{
int ret;
ret = ioctl(fd, SPI_IOC_MESSAGE(ntransfers), spi_xfrs);
if (ret < 1)
pabort("can't send spi message");
}
static void transfer(int fd, uint8_t *tx, uint8_t *rx, int len)
{
int ret;
struct spi_ioc_transfer tr = {
.len = len,
};
printf("\n%s(len=%d):\n", __func__);
if (tx) {
tr.tx_buf = (unsigned long)tx;
printf(" TX: ");
print_hex(tx, len);
}
if (rx)
tr.rx_buf = (unsigned long)rx;
ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
if (ret < 1)
pabort("can't send spi message");
if (rx) {
printf(" RX: ");
print_hex(rx, len);
}
}
void P_CCONV pLog(PLogVerbosityEnum verbosity,
PLogChannelEnum channel,
const pchar *file,
puint32 line,
const pchar *format,
...)
{
// The global verbosity value controls which kinds of log can be
// printed.
if (verbosity < g_logVerbosity)
{
return ;
}
static const pchar *verbosityText[] =
{
"(debug)",
"(info)",
"(warning)",
"(error)",
"(fatal)",
};
va_list arguments;
va_start(arguments, format);
if (pstrlen(format) > 200)
{
pchar message[1024];
puint32 nchars = psprintf(message, 1024,
"(warning)%s:%d,log buffer for formatting data is too small.",
__FILE__, __LINE__);
pLogOutput(P_LOG_CHANNEL2, message, nchars);
}
else
{
pchar msg[3000];
puint32 nchars;
if (verbosity == P_LOG_ERROR || verbosity == P_LOG_WARNING)
{
pchar fmt[256];
psprintf(fmt, 256, "%s%s:%d,%s",
verbosityText[verbosity], file, line, format);
nchars = pvsprintf(msg, 3000, fmt, arguments);
}
else
{
nchars = pvsprintf(msg, 3000, format, arguments);
}
pLogOutput(channel, msg, nchars);
}
if (verbosity == P_LOG_FATAL)
{
// FIXME: make it more polite
pabort();
}
}
void spi_close(spi_context* spi)
{
if(close(spi->fd) < 0) {
pabort("can't close SPI device");
}
delete spi;
}
static void transfer(int fd)
{
int ret,i,k;
uint8_t tr[160];
uint8_t tx0[] = {
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
};/* Digit 1 */
uint8_t tx1[] = {
0x19,0xFB,0xEC,0x08,0x08,0x0F,0x09,0x10
};/* Digit 1 */
uint8_t tx2[] = {
0x18,0xFF,0xE9,0x08,0x0B,0x0E,0x08,0x04
};/* Digit 1 */
uint8_t tx3[] = {
0x10,0x09,0x0f,0x08,0x08,0xEC,0xFB,0x19
};/* Digit 1 */
uint8_t tx4[] = {
0x04,0x08,0x0E,0x0B,0x08,0xE9,0xFF,0x18
};/* Digit 1 */
memset(tr,0,80);
memcpy(tr,tx0,8);
memcpy((tr+8),tx1,8);
memcpy((tr+16),tx2,8);
memcpy((tr+24),tx3,8);
memcpy((tr+32),tx4,8);
ret = ioctl(fd, SPI_LED_TX_PATTERN, &tr);
if (ret < -1)
pabort("can't send spi message");
sleep(1);
}
static void transfer(int fd)
{
int ret;
uint8_t tx[] = {
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0x40, 0x00, 0x00, 0x00, 0x00, 0x95,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xDE, 0xAD, 0xBE, 0xEF, 0xBA, 0xAD,
0xF0, 0x0D,
};
uint8_t rx[ARRAY_SIZE(tx)] = {0, };
struct spi_ioc_transfer tr;
tr.tx_buf = (unsigned long)tx;
tr.rx_buf = (unsigned long)rx;
tr.len = ARRAY_SIZE(tx);
tr.interbyte_usecs = 10;
tr.delay_usecs = delay;
tr.speed_hz = speed;
tr.bits_per_word = bits;
ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
if (ret < 1)
pabort("can't send spi message");
for (ret = 0; ret < ARRAY_SIZE(tx); ret++) {
if (!(ret % 6))
puts("");
printf("%.2X ", rx[ret]);
}
puts("");
}
static void transfer(int fd)
{
int ret;
uint8_t tx[] = {
0x01, 0x02, 0x03
};
uint8_t rx[ARRAY_SIZE(tx)] = {0, };
struct spi_ioc_transfer tr;
tr.tx_buf = (unsigned long)tx;
tr.rx_buf = (unsigned long)rx;
tr.len = ARRAY_SIZE(tx);
tr.delay_usecs = 0;
tr.speed_hz = speed;
tr.bits_per_word = bits;
ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
if (ret < 1)
pabort("can't send spi message");
for (ret = 0; ret < ARRAY_SIZE(tx); ret+=3) {
//printbits((rx[ret]<<16) + (rx[ret+1]<<8) + rx[ret+2], 24);
printf("CHA: %d \n", (((rx[ret]<<16) + (rx[ret+1]<<8) + rx[ret+2])&0b000000000000001111111111));
//printf("%.2X ", rx[ret]);
}
//puts("");
}
void spi_transfern(char *buf, uint32_t len) {
int ret;
//dump("TR tx", (uint8_t *)buf, len);
#ifdef BCM
bcm2835_spi_transfern(buf, len);
#else
uint8_t *rx = malloc(len);
struct spi_ioc_transfer tr = {
.tx_buf = (unsigned long)buf,
.rx_buf = (unsigned long)rx,
.len = len,
.delay_usecs = delay,
.speed_hz = speed,
.bits_per_word = bits,
};
ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
if (ret < 1) {
free(rx);
pabort("can't send spi message");
}
memcpy(buf, rx, len);
free(rx);
#endif
}
void spi_writenb(char * buf, uint32_t len) {
int ret;
dump("WR tx", (uint8_t *)buf, len);
#ifdef BCM
bcm2835_spi_writenb(buf, len);
#else
struct spi_ioc_transfer tr = {
.tx_buf = (unsigned long)buf,
.rx_buf = (unsigned long)0,
.len = len,
.delay_usecs = delay,
.speed_hz = speed,
.bits_per_word = bits,
};
ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
if (ret < 1)
pabort("can't send spi message");
#endif
}
static PyObject* logiWrite(PyObject* self, PyObject* arg)
{
PyObject* transferTuple;
unsigned int offset, returnVal ;
unsigned char type_size = 1 ;
if(!PyArg_ParseTuple(arg, "lO|b", &offset, &transferTuple, &type_size))
return NULL;
if(!PyTuple_Check(transferTuple))
pabort("Only accepts a single tuple as an argument\n");
if(type_size != 1 && type_size != 2 && type_size != 4)
pabort("type_size argument can only be 1, 2, 4\n");
uint32_t tupleSize = PyTuple_Size(transferTuple);
uint8_t tx[tupleSize*type_size];
PyObject* tempItem;
uint32_t i=0;
while(i < tupleSize)
{
tempItem = PyTuple_GetItem(transferTuple, i); //
if(!PyInt_Check(tempItem))
{
pabort("non-integer contained in tuple\n");
}
switch(type_size){
case 1:
tx[i] = (uint8_t)PyInt_AsSsize_t(tempItem);
break ;
case 2:
((uint16_t*)tx)[i] = (uint16_t)PyInt_AsSsize_t(tempItem);
break ;
case 4:
((uint32_t*)tx)[i] = (uint32_t)PyInt_AsSsize_t(tempItem);
break ;
default:
break ;
}
i++;
}
returnVal = logi_write(tx, tupleSize*type_size, offset);
return Py_BuildValue("l", returnVal) ;
}
void make_bulk_transfer(int len)
{
uint8_t *buf = malloc(len);
if (NULL == buf)
pabort("malloc failed");
memset(buf, 0xCB, len);
add_transfer(buf, len);
}
static void transfer(int fd, uint8_t const *tx, uint8_t const *rx, size_t len)
{
int ret;
struct spi_ioc_transfer tr = {
.tx_buf = (unsigned long)tx,
.rx_buf = (unsigned long)rx,
.len = len,
.delay_usecs = delay,
.speed_hz = speed,
.bits_per_word = bits,
};
if (mode & SPI_TX_QUAD)
tr.tx_nbits = 4;
else if (mode & SPI_TX_DUAL)
tr.tx_nbits = 2;
if (mode & SPI_RX_QUAD)
tr.rx_nbits = 4;
else if (mode & SPI_RX_DUAL)
tr.rx_nbits = 2;
if (!(mode & SPI_LOOP)) {
if (mode & (SPI_TX_QUAD | SPI_TX_DUAL))
tr.rx_buf = 0;
else if (mode & (SPI_RX_QUAD | SPI_RX_DUAL))
tr.tx_buf = 0;
}
ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
if (ret < 1)
pabort("can't send spi message");
if (verbose)
hex_dump(tx, len, 32768, "TX");
hex_dump(rx, len, 32768, "RX");
}
static void print_usage(const char *prog)
{
printf("Usage: %s [-DsbdlHOLC3]\n", prog);
puts(" -D --device device to use (default /dev/spidev1.1)\n"
" -s --speed max speed (Hz)\n"
" -d --delay delay (usec)\n"
" -b --bpw bits per word \n"
" -l --loop loopback\n"
" -H --cpha clock phase\n"
" -O --cpol clock polarity\n"
" -L --lsb least significant bit first\n"
" -C --cs-high chip select active high\n"
" -3 --3wire SI/SO signals shared\n"
" -v --verbose Verbose (show tx buffer)\n"
" -p Send data (e.g. \"1234\\xde\\xad\")\n"
" -N --no-cs no chip select\n"
" -R --ready slave pulls low to pause\n"
" -2 --dual dual transfer\n"
" -4 --quad quad transfer\n");
exit(1);
}
static PyObject* transfer(PyObject* self, PyObject* args)
{
PyObject* pyObj;
if(!PyArg_ParseTuple(args, "O", &pyObj))
return NULL;
uint8_t tupleSize = PyTuple_Size(pyObj);
uint8_t tx[bytesPerMessage];
uint8_t rx[bytesPerMessage];
PyObject* item;
uint8_t i=0;
while(i<bytesPerMessage){
if(i<tupleSize){
item = PyTuple_GetItem(pyObj, i);
if(!PyInt_Check(item)){
printf("non-integer contained in tuple");
exit(1);
}
tx[i] = PyFloat_AsDouble(item);
}
else
tx[i] = 0;
i++; // printf("%d ", tx[i++]);
}
struct spi_ioc_transfer tr = {
.tx_buf = (unsigned long)tx,
.rx_buf = (unsigned long)rx,
.len = bytesPerMessage,
.delay_usecs = delay,
.speed_hz = speed,
.bits_per_word = bits,
};
ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
if (ret < 1)
pabort("can't send spi message");
pyObj = PyTuple_New(bytesPerMessage);
for(i=0;i<bytesPerMessage;i++){
PyTuple_SetItem(pyObj, i, Py_BuildValue("i",rx[i]));
}
return pyObj;
}
static PyObject* end(PyObject* self,PyObject* args)
{
close(fd);
Py_RETURN_NONE;
}
int main(int argc, char *argv[])
{
int ret = 0;
int fd;
parse_opts(argc, argv);
fd = open(device, O_RDWR);
if (fd < 0)
pabort("can't open device");
/*
* spi mode
*/
printf("mode=%d\n",mode);
// mode = 3;
ret = ioctl(fd, SPI_IOC_WR_MODE, &mode);
if (ret == -1)
pabort("can't set spi mode");
ret = ioctl(fd, SPI_IOC_RD_MODE, &mode);
if (ret == -1)
pabort("can't get spi mode");
/*
* bits per word
*/
ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits);
if (ret == -1)
pabort("can't set bits per word");
ret = ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits);
if (ret == -1)
pabort("can't get bits per word");
/*
* max speed hz
*/
speed = 8000000;
ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed);
if (ret == -1)
pabort("can't set max speed hz");
ret = ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed);
if (ret == -1)
pabort("can't get max speed hz");
printf("spi mode: %d\n", mode);
printf("bits per word: %d\n", bits);
printf("max speed: %d Hz (%d KHz)\n", speed, speed/1000);
while(1)
{
// sleep(1);
spi_write_read(fd);
// printf("\n");
}
close(fd);
return ret;
}
// bus freq range 10kHz-400kHz
void TwoWire::setBusFreq(unsigned int speed_hz)
{
int libi2cdev;
if ((speed_hz > 400000) || (speed_hz < 10000))
{
printf("invalid bus freq, range[10000,400000]\r\n");
return;
}
if ((libi2cdev = open("/dev/hwi2c", O_RDWR)) < 0)
pabort("can't open device");
if (ioctl(libi2cdev, I2CCLOCK_CHANGE, &speed_hz) < 0)
pabort("change I2C bus freq fail");
close(libi2cdev);
}
static void transfer(int fd)
{
/* ioctl is the function that activates the transmit and receive. The way to
* properly use it is to create a SPI transaction structure like "tr", which
* sets aside memory space for the data that is about to be transmitted or
* received. ioctl starts the SPI clock and transmits whatever is in the TX
* buffer. At the same time, the RX buffer is filled with whatever comes in
* on the RX line while the clock is active. SPI_IOC_MESSAGE(n) tells ioctl
* that it is sending a SPI messages. The n tells it how many messages to send.
*
* The spi_ioc_transfer function contains the parameters for the transaction to
* take place. Transactions can be linked together in arrays. See the function
* definition for more information.
*/
int ret;
uint8_t tx[] = {
0x10, 0x01, 0xe0, 0x01, 0x00, 0x00
};
uint8_t rx[ARRAY_SIZE(tx)] = {0, };
struct spi_ioc_transfer tr = {
.tx_buf = (unsigned long)tx,
.rx_buf = (unsigned long)rx,
.len = ARRAY_SIZE(tx),
.delay_usecs = delay,
.speed_hz = speed,
.bits_per_word = bits,
.cs_change = 1,
};
ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
if (ret < 1)
pabort("can't send spi message");
for (ret = 0; ret < ARRAY_SIZE(tx); ret++) {
if (!(ret % 6))
puts("");
printf("%.2X ", rx[ret]);
}
puts("");
}
static void print_usage(const char *prog)
{
printf("Usage: %s [-DsbdlHOLC3]\n", prog);
puts(" -D --device device to use (default /dev/spidev1.1)\n"
" -s --speed max speed (Hz)\n"
" -d --delay delay (usec)\n"
" -b --bpw bits per word \n"
" -l --loop loopback\n"
" -H --cpha clock phase\n"
" -O --cpol clock polarity\n"
" -L --lsb least significant bit first\n"
" -C --cs-high chip select active high\n"
" -3 --3wire SI/SO signals shared\n");
exit(1);
}
int main(int argc, char *argv[])
{
int ret = 0;
fd = open(device, O_RDWR);
if (fd < 0)
pabort("can't open device");
parse_opts(argc, argv);
if(argc <= 1) {
/*
* spi mode
*/
ret = ioctl(fd, SPI_IOC_WR_MODE, &mode);
if (ret == -1)
pabort("can't set spi mode");
ret = ioctl(fd, SPI_IOC_RD_MODE, &mode);
if (ret == -1)
pabort("can't get spi mode");
uint8_t msb_first = 0;
ret = ioctl(fd, SPI_IOC_WR_LSB_FIRST, &msb_first);
if(ret == -1)
pabort("can't set msb first");
/*
* bits per word
*/
ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits);
if (ret == -1)
pabort("can't set bits per word");
ret = ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits);
if (ret == -1)
pabort("can't get bits per word");
/*
* max speed hz
*/
ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed);
if (ret == -1)
pabort("can't set max speed hz");
ret = ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed);
if (ret == -1)
pabort("can't get max speed hz");
ymu836_audio_init();
}
close(fd);
return ret;
}
int spi_init() {
int ret = 0;
mode = 0;
delay = 0;
#ifdef BCM
if (!bcm2835_init())
return 0;
bcm2835_spi_begin();
bcm2835_spi_setClockDivider(SPI_CLOCK_DIVIDER); // 250MHz / 26 = 9.6MHz
bcm2835_spi_setDataMode(BCM2835_SPI_MODE0); // CPOL = 0, CPHA = 0
bcm2835_spi_chipSelect(BCM2835_SPI_CS1); // chip select 1
return 1;
#else
fd = open(device, O_RDWR);
if (fd < 0)
pabort("can't open device");
/*
* spi mode
*/
ret = ioctl(fd, SPI_IOC_WR_MODE, &mode);
if (ret == -1)
pabort("can't set spi mode");
ret = ioctl(fd, SPI_IOC_RD_MODE, &mode);
if (ret == -1)
pabort("can't get spi mode");
/*
* bits per word
*/
ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits);
if (ret == -1)
pabort("can't set bits per word");
ret = ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits);
if (ret == -1)
pabort("can't get bits per word");
/*
* max speed hz
*/
ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed);
if (ret == -1)
pabort("can't set max speed hz");
ret = ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed);
if (ret == -1)
pabort("can't get max speed hz");
printf("spi mode: %d\n", mode);
printf("bits per word: %d\n", bits);
printf("max speed: %d Hz (%d KHz)\n", speed, speed/1000);
return 1;
#endif
}
static void transfer(int fd)
{
int ret;
uint8_t tx[8] = {
0x08, 0x02, 0x03, 0x04,
0x05, 0x06, 0x07, 0x08
};
uint8_t rx[8] = {0};
struct spi_ioc_transfer tr = {
.tx_buf = (unsigned long)tx,
.rx_buf = (unsigned long)rx,
.len = 8,
.delay_usecs = delay,
.speed_hz = speed,
.bits_per_word = bits,
};
while(1)
{
ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
if (ret < 1)
pabort("can't send spi message");
printf("read:%x,%x,%x,%x\n",rx[0],rx[1],rx[2],rx[7]);
usleep(10);
}
}
static void do_msg(int fd)
{
unsigned char tbuf[8];
unsigned char rbuf[8];
unsigned char *bp;
struct spi_ioc_transfer xfer[2];
int status;
tbuf[0]=1;
tbuf[1]=2;
tbuf[2]=3;
tbuf[3]=4;
tbuf[4]=1;
//memset(xfer, 0, sizeof(xfer));
xfer[0].tx_buf = (unsigned long) tbuf;
xfer[0].rx_buf = (unsigned long) rbuf;
xfer[0].len = 5;
while(1){
status = ioctl(fd, SPI_IOC_MESSAGE(1), xfer);
printf("%d,write\n",status);
if (status < 0) {
printf("write wrong!\n");
return;
}
usleep(10);
}
}
static void transfer_escaped_string(int fd, char *str)
{
size_t size = strlen(str);
uint8_t *tx;
uint8_t *rx;
tx = malloc(size);
if (!tx)
pabort("can't allocate tx buffer");
rx = malloc(size);
if (!rx)
pabort("can't allocate rx buffer");
size = unescape((char *)tx, str, size);
transfer(fd, tx, rx, size);
free(rx);
free(tx);
}
void detachInterrupt(uint8_t interruptNum)
{
int ret = -1, fd = -1;
if(interruptNum < EXTERNAL_NUM_INTERRUPTS) {
fd = open(swirq_dev, O_RDONLY);
if ( fd < 0 )
pabort("open swirq device fail");
ret = ioctl(fd, SWIRQ_STOP, &interruptNum);
if (ret < 0)
pabort("can't set SWIRQ_STOP");
if (fd)
close(fd);
}
}
int main(int argc, char *argv[])
{
int ret = 0;
int fd;
//mode |= SPI_MSB_FIRST;
parse_opts(argc, argv);
fd = open(device, O_RDWR);
if (fd < 0)
pabort("can't open device");
ret = ioctl(fd, SPI_IOC_WR_MODE, &mode);
if (ret == -1)
pabort("can't set spi mode");
/*
* bits per word
*/
ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits);
if (ret == -1)
pabort("can't set bits per word");
/*
* max speed hz
*/
ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed);
if (ret == -1)
pabort("can't set max speed hz");
//printf("spi mode: %d\n", mode);
//printf("bits per word: %d\n", bits);
//printf("max speed: %d Hz (%d KHz)\n", speed, speed/1000);
transfer(fd);
close(fd);
return ret;
}
