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30 lines
679 B
30 lines
679 B
#include "spi.h"
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// https://controllerstech.com/spi-using-registers-in-stm32/
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void spi_initMater(spiCH_t_spi_hw_ch)
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{
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RCC->APB2ENR |= (1<<12); // Enable SPI1 CLock
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SPI1->CR1 |= (1<<0)|(1<<1); // CPOL=1, CPHA=1
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SPI1->CR1 |= (1<<2); // Master Mode
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SPI1->CR1 |= (3<<3); // BR[2:0] = 011: fPCLK/16, PCLK2 = 80MHz, SPI clk = 5MHz
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SPI1->CR1 &= ~(1<<7); // LSBFIRST = 0, MSB first
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SPI1->CR1 |= (1<<8) | (1<<9); // SSM=1, SSi=1 -> Software Slave Management
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SPI1->CR1 &= ~(1<<10); // RXONLY = 0, full-duplex
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SPI1->CR1 &= ~(1<<11); // DFF=0, 8 bit data
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SPI1->CR2 = 0;
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}
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uint8_t spi_trx(spiCH_t_spi_hw_ch, uint8_t tx_data)
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{
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return 0;
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}
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