86 lines
2.4 KiB
C
86 lines
2.4 KiB
C
#include "BSPSpi.h"
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#include <cpu.h>
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#include <os.h>
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#include <bsp_int.h>
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#include <bsp_sys.h>
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#include <lib_def.h>
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#include <os_cpu.h>
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#include "BSPSys.h"
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#include "driverlib/sysctl.h"
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#include "driverlib/gpio.h"
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#include "driverlib/pin_map.h"
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#include "driverlib/ssi.h"
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#include "driverlib/interrupt.h"
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#include "inc/hw_memmap.h"
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#include "inc/hw_ssi.h"
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#include "inc/hw_ints.h"
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int8_t Bsp_SpiInit(uint8_t spi_id)
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{
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INT32U pui32DataRx;
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switch (spi_id) {
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case BSP_SPI3:
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// 初始化GPIO口
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SysCtlPeripheralEnable(SYSCTL_PERIPH_SSI3);
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SysCtlPeripheralEnable(SPI3_SYS_PERIPH_GPIO);
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GPIOPinConfigure(SPI3_GPIO_CLK_CFG);
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GPIOPinConfigure(SPI3_GPIO_FSS_CFG);
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GPIOPinConfigure(SPI3_GPIO_RX_CFG);
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GPIOPinConfigure(SPI3_GPIO_TX_CFG);
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// 配置SPI初始化的参数
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GPIOPinTypeSSI(SPI3_GPIO_BASE, SPI3_GPIO_CLK | SPI3_GPIO_FSS |
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SPI3_GPIO_RX | SPI3_GPIO_TX );
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SSIConfigSetExpClk(SSI3_BASE, BspGetSysClock(), SSI_FRF_MOTO_MODE_0,
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SSI_MODE_MASTER, 1000000, 8);
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// 使能SPI时钟总线
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SSIEnable(SSI3_BASE);
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while(SSIDataGetNonBlocking(SSI3_BASE, &pui32DataRx)); // 清除接收缓冲区
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break;
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}
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return 0;
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}
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uint8_t Bsp_RWByte(uint8_t spi_id, uint8_t data)
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{
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uint32_t rec = 0;
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CPU_SR_ALLOC();
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OS_ENTER_CRITICAL();
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switch (spi_id) {
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case BSP_SPI3:
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while(SSIDataGetNonBlocking(SSI3_BASE, &rec)); // 清除接收缓冲区
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SSIDataPut(SSI3_BASE, data);
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while (SSIBusy(SSI3_BASE));
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SSIDataGet(SSI3_BASE, &rec);
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break;
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}
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OS_EXIT_CRITICAL();
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return (uint8_t)(rec & 0xff);
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}
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void Bsp_SpiSetSpeed(uint8_t spi_id, uint32_t Speed)
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{
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switch (spi_id) {
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case BSP_SPI3:
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SSIDisable(SSI3_BASE);
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SSIConfigSetExpClk(SSI3_BASE, BspGetSysClock(),
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SSI_FRF_MOTO_MODE_0, SSI_MODE_MASTER,
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Speed, 8);
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SSIEnable(SSI3_BASE);
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break;
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}
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}
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void Bsp_SpiCS(uint8_t spi_id, uint8_t value)
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{
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switch (spi_id) {
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case BSP_SPI3:
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GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_2,
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value == 1 ? GPIO_PIN_2 : ~ GPIO_PIN_2); // 低电平运行，高电平停止
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break;
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}
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}
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