/********************************************************************
* 名 称：InitPIO()
* 功 能：初始化LED_PIO为输出，KEY为输入，开中断，清边沿捕获寄存器
* 入口参数：无
* 出口参数：无
********************************************************************/
void InitPIO(void)
{
/* 初始化LED_PIO为输出，KEY为输入 */
IOWR_ALTERA_AVALON_PIO_DIRECTION(LED_PIO_BASE, LEDCON);
IOWR_ALTERA_AVALON_PIO_DIRECTION(KEY_PIO_BASE, 0x00);
/* 开KEY的中断 */
IOWR_ALTERA_AVALON_PIO_IRQ_MASK(KEY_PIO_BASE, KEYCON);
/* 清边沿捕获寄存器 */
IOWR_ALTERA_AVALON_PIO_EDGE_CAP(KEY_PIO_BASE, 0x00);
/* 注册中断服务子程序 */
alt_irq_register(KEY_PIO_IRQ, NULL, KeyDown_interrupts);
}
void trigger_reset()
{
/* Drive a 0 out to the configuration PLD reconfig_request pin. */
IOWR_ALTERA_AVALON_PIO_DATA( RECONFIG_REQUEST_PIO_BASE, 0x0 );
/* Set BIDIR PIO to drive out. */
IOWR_ALTERA_AVALON_PIO_DIRECTION( RECONFIG_REQUEST_PIO_BASE, 1 );
usleep ( 1000000 );
/* Drive out a 1....probably won't reach this point!!! */
IOWR_ALTERA_AVALON_PIO_DATA( RECONFIG_REQUEST_PIO_BASE, 0x1 );
}
/* SDA _________--------
SCL ____------------- */
void stopSCCB(void)
{
IOWR_ALTERA_AVALON_PIO_DIRECTION(SDA_BASE, OUT);
SIO_D_CLR;
usleep(DELAY_TIME);
SIO_C_SET;
usleep(DELAY_TIME);
SIO_D_SET;
usleep(DELAY_TIME);
}
int main() {
int input = 'A';
int i;
while (input != 'E') {
alt_putstr("\n");
alt_putstr("\nTo READ type 'R' and press enter.\n");
alt_putstr("\nTo WRITE type 'W' and press enter.\n");
alt_putstr("\nTo exit the program, enter 'E'\n");
input = alt_getchar();
if (input == 'R') {
*enable = 0x0;
*readWrite = 0x1; // read
for (i = 0; i < 128; i++) {
IOWR_ALTERA_AVALON_PIO_DIRECTION(*data, 0xFF);
(*address) = i;
*leds = *data;
alt_printf("%x \n", *data);
usleep(1000);
}
input = 'A';
alt_printf("Read complete\n");
} else if (input == 'W') {
*enable = 0x0;
*readWrite = 0x0; // write
IOWR_ALTERA_AVALON_PIO_DIRECTION(*data, 0x00000000);
for (i = 0; i < 128; i++) {
*address = i;
*data = 0x00000000;
*data = 127 - i;
alt_printf("%x\n", *data);
}
input = 'A';
}
}
return 0;
}
void startSCCB(void)
{
IOWR_ALTERA_AVALON_PIO_DIRECTION(SDA_BASE, OUT);
SIO_D_SET; //数据线高电平
usleep(DELAY_TIME);
SIO_C_SET; //在时钟线高的时候数据线由高至低
usleep(DELAY_TIME);
SIO_D_CLR;
usleep(DELAY_TIME);
SIO_C_CLR; //数据线恢复低电平，单操作函数必要
usleep(DELAY_TIME);
}
/* SDA ____zzzzzzzzzzzzz
SCL ____------_______ */
void noAck(void)
{
IOWR_ALTERA_AVALON_PIO_DIRECTION(SDA_BASE, IN);
SIO_D_SET;
usleep(DELAY_TIME);
SIO_C_SET;
usleep(DELAY_TIME);
SIO_C_CLR;
usleep(DELAY_TIME);
SIO_D_CLR;
usleep(DELAY_TIME);
}
int main()
{
IOWR(SEVENSEG0_BASE, 0, 0);
I2C_init(I2C0_BASE, ALT_CPU_CPU_FREQ, 400000);
// Initialize Audio CODEC
write_wm(0xF, 0); // reset
write_wm(2, 0x79 << 0); // L volume +6db
write_wm(3, 0x79 << 0); // R volume +6db
write_wm(4, (1 << 1) | (1 << 4)); // mic mute, DAC select
write_wm(5, 0); // no DAC mute
write_wm(6, 0); // power up
write_wm(7, 2 | (1 << 6) | (0 << 2) | (2 << 0)); // I2S, 16 bit, Master
write_wm(8, 1 | (1 << 1) | (8 << 2) | (1 << 0)); // usb mode, 272fs, 44.1 Khz
write_wm(9, 1); // activate
// build waveform template (two periods of sine wave)
int fs = 12000000/272; // 44.1k
int t = 0;
int f = 1000;
int w = 2*31415*f / 10000;
int A = 16000;
int offset = 0;
IOWR(AUDIO0_BASE, 4, 0); // CMD_ADDR - fifo_clear
for(t=0; t<MAX_SAMPLES; t++)
{
// t en periodos de sampling
// t * 1/fs es tiempo
int y = (int)(A*sinf(w*t/(float)fs)) + offset;
wave[t] = y;
}
// Fill SDRAM
size_t block = 7*1024*1024;
uint8_t* ptr = (uint8_t*)malloc(block); // 7MB
for(t=0; t<block; t+=4)
{
uint32_t* p = (uint32_t*)(ptr + t);
*p = (uint32_t)(wave[t/4] << 16) | wave[t/4];
}
IOWR_ALTERA_AVALON_PIO_DIRECTION(PIO0_BASE, ALTERA_AVALON_PIO_DIRECTION_INPUT);
t = 0;
while(true)
{
if((IORD(PIO0_BASE, 0) & 0x1) == 0)
{
IOWR(SEVENSEG0_BASE, 0, 1);
if( IORD(AUDIO0_BASE,5) & 0x1 ) continue; // STATUS_ADDR
if(t >= MAX_SAMPLES) t = 0;
int y = wave[t++];
IOWR(AUDIO0_BASE, 0, y); // DAC_LFIFO_ADDR
IOWR(AUDIO0_BASE, 1, y); // DAC_RFIFO_ADDR
}
else
{
IOWR(SEVENSEG0_BASE, 0, 2);
}
}
return 0;
}
void vParTestInitialise( void )
{
IOWR_ALTERA_AVALON_PIO_DIRECTION( LED_PIO_BASE, ALTERA_AVALON_PIO_DIRECTION_OUTPUT );
ulLedStates = 0;
}
/*****************************************************************************
* *
* Function : Initilise_Keypad *
* Author : Queron Williams *
* Date : 02/03/2014 *
* Inputs : N/A *
* Outputs : N/A *
* Description : Sets up the keypad ready for use by enabling PORTA to *
* be used as an input *
* *
******************************************************************************/
void Initilise_Keypad()
{
/* set portA to be used as an input */
IOWR_ALTERA_AVALON_PIO_DIRECTION(PORT_A_BASE, ALTERA_AVALON_PIO_DIRECTION_INPUT);
}
