大理水控初始版本
diff --git a/lcd/spi.c b/lcd/spi.c
new file mode 100644
index 0000000..23bb27a
--- /dev/null
+++ b/lcd/spi.c
@@ -0,0 +1,79 @@
+#include "spi.h"
+
+static void spi_gpio_init(void)
+{
+ GPIO_InitTypeDef GPIO_InitStructure;
+
+ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_AFIO, ENABLE);
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15|GPIO_Pin_13;
+ GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
+ GPIO_Init(GPIOB, &GPIO_InitStructure);
+
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
+ GPIO_Init(GPIOB, &GPIO_InitStructure);
+}
+
+static void spi_cs_init(void)
+{
+ GPIO_InitTypeDef GPIO_InitStructure;
+
+ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOA, ENABLE);
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
+ GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
+ GPIO_Init(GPIOB, &GPIO_InitStructure);
+
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
+ GPIO_Init(GPIOC, &GPIO_InitStructure);
+
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
+ GPIO_Init(GPIOA, &GPIO_InitStructure);
+
+ GPIO_SetBits(GPIOB, GPIO_Pin_12);
+ GPIO_SetBits(GPIOC, GPIO_Pin_7);
+ GPIO_SetBits(GPIOA, GPIO_Pin_8);
+}
+
+void spi_init(void)
+{
+ SPI_InitTypeDef SPI_InitStructure;
+
+ spi_cs_init();
+ spi_gpio_init();
+
+ RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
+ SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
+ SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
+ SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
+ SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
+ SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
+ SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
+ SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_16;
+ SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
+ SPI_InitStructure.SPI_CRCPolynomial = 7;
+ SPI_Init(SPI2, &SPI_InitStructure);
+
+ SPI_Cmd(SPI2, ENABLE);
+}
+
+//transmit/receive
+uint8_t spi_transive(uint8_t byte, uint32_t timeout)
+{
+ uint32_t timer;
+
+ timer = timeout;
+ while((SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET)&&timer)
+ {
+ timer --;
+ }
+ SPI_I2S_SendData(SPI2, byte);
+
+ timer = timeout;
+ while((SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET)&&timer)
+ {
+ timer --;
+ }
+ return SPI_I2S_ReceiveData(SPI2);
+}