How do I initial CS43L22 on STM32F407G?

BC.1 · ‎2020-11-23

Hi,

I tried couple to run my code, but I can't just hear any noise or beep. I am very new to this.

One issue that I found is SPI3->DR is not receiving anything during debugging.

Here is my code and correct me,

#include <mbed.h>

#include<I2C.h>

#include <stm32f4xx_hal.h>

I2C i2c(PB_9,PB_6);

int main() {

//SETTING UP FOR SPI3

RCC->APB1ENR |= RCC_APB1ENR_SPI3EN; //Enable SPI3 clock

RCC->APB1RSTR |= (1<<15);//Reset the SPI3

RCC->APB1RSTR &= ~(1<<15);//Clear the SPI3

RCC->AHB1ENR |= RCC_AHB1ENR_GPIOCEN;//Enable GPIO clock

RCC->AHB1ENR |= RCC_AHB1ENR_GPIOAEN;//Enable GPIO clock

int mclk_pinc=7,sclk_pinc=10,sd_pinc=12,fs_pina=4;//mclk_pin=7,sclk_pin=10,sd_pin=12,fs_pin=4;

const int slave_addr=0x94;

char sound_data[2];

// Configure I2S MCK, SCK, SD pins.

GPIOC->MODER &= ~(3UL<<(mclk_pinc*2));

GPIOC->MODER |= 2UL<<(mclk_pinc*2);

GPIOC->MODER &= ~(3UL<<(sclk_pinc*2));

GPIOC->MODER |= 2UL<<(sclk_pinc*2);

GPIOC->MODER &= ~(3UL<<(sd_pinc*2)); //sd_pin

GPIOC->MODER |= 2UL<<(sd_pinc*2);

GPIOA->MODER &= ~(3UL<<(fs_pina*2)); // lr clk

GPIOA->MODER |= 2UL<<(fs_pina*2);

GPIOE->OTYPER &=~(1<<mclk_pinc);

GPIOE->OTYPER &=~(1<<sclk_pinc);

GPIOE->OTYPER &=~(1<<sd_pinc);

GPIOA->OTYPER &=~(1<<fs_pina);

GPIOC->OSPEEDR |= (3<<(mclk_pinc*2));//High speed

GPIOC->OSPEEDR |= (3<<(sclk_pinc*2));//High speed

GPIOC->OSPEEDR |= (3<<(sd_pinc*2));//High speed

GPIOA->OSPEEDR |= (3<<(fs_pina*2));//High speed

GPIOC->PUPDR &=~(3UL<<(mclk_pinc*2));

GPIOC->PUPDR &=~(3UL<<(sclk_pinc*2));

GPIOC->PUPDR &=~(3UL<<(sd_pinc*2));

GPIOA->PUPDR &=~(3UL<<(fs_pina*2));

/* (appendix I of book) */

GPIOC->AFR[1] &= ~0xffffffff;//SPI3_SCK Serial Clock (mapped on the SCK pin)

GPIOC->AFR[1] |= 0x00000600;

GPIOC->AFR[1] &= ~0xffffffff;//SPI3_MOSI SD: Serial Data (mapped on the MOSI pin)

GPIOC->AFR[1] |= 0x00060000;

GPIOC->AFR[0] &= ~0xffffffff;//SPI3_MOSI SD: Serial Data (mapped on the MOSI pin)

GPIOC->AFR[0] |= 0x60000000;

GPIOA->AFR[0] &= ~0xffffffff;//SPI3_NSS WS: Word Select (mapped on the NSS pin)

GPIOA->AFR[0] |= 0x00060000;

// Configure CS43L22.

sound_data[0] =0x02;

sound_data[1] =0x01;