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#ifndef SPI_H
#define SPI_H
#include <os/thread.h>
struct SPI_reg_t {
volatile uint32_t CR1;
volatile uint32_t CR2;
volatile uint32_t SR;
volatile uint32_t DR;
volatile uint32_t CRCPR;
volatile uint32_t RXCRCR;
volatile uint32_t TXCRCR;
volatile uint32_t I2SCFGR;
volatile uint32_t I2SPR;
};
class SPI_t {
public:
SPI_reg_t& reg;
SPI_t(uint32_t reg_addr) : reg(*(SPI_reg_t*)reg_addr) {}
uint8_t transfer_byte(uint8_t out = 0) {
reg.DR = out;
while(!(reg.SR & 0x01)) {
Thread::yield();
}
return reg.DR;
}
};
#if defined(STM32F1)
#elif defined(STM32F4)
static SPI_t SPI1(0x40013000);
static SPI_t SPI2(0x40003800);
static SPI_t SPI3(0x40003c00);
#endif
#endif
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