133 lines
4.1 KiB
C
133 lines
4.1 KiB
C
#include <bsp_spi.h>
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#include <stdint.h>
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void Soft_SPI_APIs_Register(SSAS *spi_dev,void(*Soft_SPI_GPIO_Port_Init)(void),
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void(*Soft_SPI_SCK)(uint8_t state),
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void(*Soft_SPI_MOSI)(uint8_t state),
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uint8_t(*Soft_SPI_MISO)(void),
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void(*Soft_SPI_CS)(uint8_t state),
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void(*Soft_SPI_CS2)(uint8_t state),
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void(*Soft_SPI_CS3)(uint8_t state)) {
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spi_dev->Soft_SPI_GPIO_Port_Init = Soft_SPI_GPIO_Port_Init;
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spi_dev->Soft_SPI_SCK = Soft_SPI_SCK;
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spi_dev->Soft_SPI_MOSI = Soft_SPI_MOSI;
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spi_dev->Soft_SPI_MISO = Soft_SPI_MISO;
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spi_dev->Soft_SPI_CS = Soft_SPI_CS;
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spi_dev->Soft_SPI_CS2 = Soft_SPI_CS2;
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spi_dev->Soft_SPI_CS3 = Soft_SPI_CS3;
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}
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void Soft_SPI_Init(SSAS *spi_dev) {
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if (spi_dev->Soft_SPI_GPIO_Port_Init != NULL) {
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spi_dev->Soft_SPI_GPIO_Port_Init(); // Initialize SPI GPIO ports
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}
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spi_dev->Soft_SPI_SCK(1); // Set SCK high
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spi_dev->Soft_SPI_MOSI(1); // Set MOSI high
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spi_dev->Soft_SPI_CS(1); // Set CS high
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#if (SPI_CS2)
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spi_dev->Soft_SPI_CS2(1); // Set CS2 high
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#endif
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#if (SPI_CS3)
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spi_dev->Soft_SPI_CS3(1); // Set CS3 high
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#endif
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}
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#if (!SPI_MISO && SPI_MOSI)
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void Soft_SPI_SendByte(SSAS *spi_Dev,uint8_t Byte) {
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uint8_t i;
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/*循环8次，主机依次发送数据的每一位*/
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for (i = 0; i < 8; i++) {
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/*使用掩码的方式取出Byte的指定一位数据并写入到D1线*/
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/*两个!的作用是，让所有非零的值变为1*/
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spi_Dev->Soft_SPI_MOSI(!!(Byte & (0x80 >> i)));
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spi_Dev->Soft_SPI_SCK(1); // 拉高D0，从机在D0上升沿读取SDA
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spi_Dev->Soft_SPI_SCK(0); // 拉低D0，主机开始发送下一位数据
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}
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}
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#else if (SPI_MISO && SPI_MOSI) || (SPI_MISO && !SPI_MOSI)
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uint8_t Soft_SPI_RecvByte(SSAS *spi_Dev,uint8_t Byte) {
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uint8_t i;
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uint8_t DATA_IN = 0;
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/*循环8次，主机依次接收数据的每一位*/
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for (i = 0; i < 8; i++) {
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spi_Dev->Soft_SPI_SCK(1); // 拉高D0，从机在D0上升沿读取SDA
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if (spi_Dev->Soft_SPI_MISO()) {
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DATA_IN |= (1 << (7 - i)); // 读取MISO线状态
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}
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spi_Dev->Soft_SPI_SCK(0); // 拉低D0，主机开始接收下一位数据
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}
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return DATA_IN;
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}
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#endif
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#if (SPI_MISO && SPI_MOSI) || (SPI_MISO && !SPI_MOSI)
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uint8_t *Soft_SPI_SwapData(SSAS *spi_Dev, uint8_t *data, uint16_t len) {
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#else if (!SPI_MISO && SPI_MOSI)
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void Soft_SPI_SwapData(SSAS *spi_Dev, uint8_t *data, uint16_t len) {
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#endif
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uint8_t i, j;
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uint8_t *DATA_OUT = data;
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uint8_t *DATA_IN;
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for (i = 0; i < len; i++) {
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for (j = 0; j < 8; j++) {
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#if (SPI_MOSI)
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// 数据输出
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spi_Dev->Soft_SPI_MOSI(!!(DATA_OUT[i] & (0x80 >> i)));
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#endif
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#if (SPI_MISO)
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// 数据输入
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if (spi_Dev->Soft_SPI_MISO()) {
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DATA_IN[i] |= (1 << (7 - j));
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} else {
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DATA_IN[i] &= ~(1 << (7 - j));
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}
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#endif
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spi_Dev->Soft_SPI_SCK(1);
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spi_Dev->Soft_SPI_SCK(0);
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}
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}
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#if (MISO && MOSI) || (MISO && !MOSI)
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return DATA_IN;
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#else if (!MISO && MOSI)
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#endif
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}
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#if (SPI_MISO && SPI_MOSI)
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uint8_t Soft_SPI_SwapBytes(SSAS *spi_Dev, uint8_t data) {
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#else if (!SPI_MISO && SPI_MOSI)
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void Soft_SPI_SwapBytes(SSAS *spi_Dev, uint8_t data) {
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#endif
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uint8_t i;
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uint8_t DATA_IN = 0;
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/*循环8次，主机依次发送数据的每一位*/
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for (i = 0; i < 8; i++) {
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#if (SPI_MOSI)
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spi_Dev->Soft_SPI_MOSI(!!(data & (0x80 >> i)));
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#endif
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#if (SPI_MISO)
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// 数据输入
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if (spi_Dev->Soft_SPI_MISO()) {
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DATA_IN |= (1 << (7 - i));
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} else {
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DATA_IN &= ~(1 << (7 - i));
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}
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#endif
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spi_Dev->Soft_SPI_SCK(1); // 拉高D0，从机在D0上升沿读取SDA
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spi_Dev->Soft_SPI_SCK(0); // 拉低D0，主机开始发送下一位数据
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}
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#if (MISO && MOSI) || (MISO && !MOSI)
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return DATA_IN;
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#else if (!MISO && MOSI)
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#endif
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}
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