147 lines
4.3 KiB
C
147 lines
4.3 KiB
C
#include "M451Series.h"
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#include "ssd1306.h"
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#define PLL_CLOCK 72000000
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void HalInit(){
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SYS_UnlockReg();
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/*---------------------------------------------------------------------------------------------------------*/
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/* Init System Clock */
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/*---------------------------------------------------------------------------------------------------------*/
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/* Enable Internal RC 22.1184MHz clock */
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CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN_Msk);
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/* Waiting for Internal RC clock ready */
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CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);
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/* Switch HCLK clock source to Internal RC and HCLK source divide 1 */
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CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HIRC, CLK_CLKDIV0_HCLK(1));
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/* Enable external XTAL 12MHz clock */
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CLK_EnableXtalRC(CLK_PWRCTL_HXTEN_Msk);
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/* Waiting for external XTAL clock ready */
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CLK_WaitClockReady(CLK_STATUS_HXTSTB_Msk);
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/* Set core clock as PLL_CLOCK from PLL */
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CLK_SetCoreClock(PLL_CLOCK);
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/* Enable UART module clock */
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/* Enable I2C0 module clock */
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CLK_EnableModuleClock(I2C0_MODULE);
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/*---------------------------------------------------------------------------------------------------------*/
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/* Init I/O Multi-function */
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/*---------------------------------------------------------------------------------------------------------*/
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SYS->GPD_MFPL &= ~SYS_GPD_MFPL_PD4MFP_Msk;
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SYS->GPD_MFPL |= SYS_GPD_MFPL_PD4MFP_I2C0_SDA;
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SYS->GPD_MFPL &= ~SYS_GPD_MFPL_PD5MFP_Msk;
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SYS->GPD_MFPL |= SYS_GPD_MFPL_PD5MFP_I2C0_SCL;
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I2C_Open(I2C0,100000);
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printf("I2C clock %d Hz\n", I2C_GetBusClockFreq(I2C0));
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I2C_SetSlaveAddr(I2C0, 0, 0x78, 0); /* Slave Address : 0x15 */
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SYS_LockReg();
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//GPIO_SetMode(PB,BIT14,GPIO_PMD_INPUT);
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//GPIO_SetMode(PB,BIT9,GPIO_PMD_OUTPUT);
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//I2C_EnableInt(I2C0);
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//NVIC_EnableIRQ(I2C0_IRQn);
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}
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typedef void (*I2C_FUNC)(uint32_t u32Status);
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static I2C_FUNC s_I2CHandlerFn = NULL;
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volatile int muxI2C = 0;
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uint8_t g_au8TxData[3];
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uint8_t g_u8DeviceAddr = 0x50;
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uint8_t g_u8DataLen;
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volatile uint8_t g_u8EndFlag = 0;
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/*---------------------------------------------------------------------------------------------------------*/
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/* I2C Tx Callback Function */
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/*---------------------------------------------------------------------------------------------------------*/
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void I2C_MasterTx(uint32_t u32Status)
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{
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if(u32Status == 0x08) /* START has been transmitted */
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{
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I2C_SET_DATA(I2C0, g_u8DeviceAddr << 1); /* Write SLA+W to Register I2CDAT */
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I2C_SET_CONTROL_REG(I2C0, I2C_CTL_SI);
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}
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else if(u32Status == 0x18) /* SLA+W has been transmitted and ACK has been received */
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{
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I2C_SET_DATA(I2C0, g_au8TxData[g_u8DataLen++]);
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I2C_SET_CONTROL_REG(I2C0, I2C_CTL_SI);
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}
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else if(u32Status == 0x20) /* SLA+W has been transmitted and NACK has been received */
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{
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I2C_STOP(I2C0);
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I2C_START(I2C0);
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}
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else if(u32Status == 0x28) /* DATA has been transmitted and ACK has been received */
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{
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if(g_u8DataLen != 3)
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{
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I2C_SET_DATA(I2C0, g_au8TxData[g_u8DataLen++]);
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I2C_SET_CONTROL_REG(I2C0, I2C_CTL_SI);
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}
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else
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{
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I2C_SET_CONTROL_REG(I2C0, I2C_CTL_STO_SI);
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g_u8EndFlag = 1;
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}
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}
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else
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{
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/* TO DO */
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printf("Status 0x%x is NOT processed\n", u32Status);
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}
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}
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void I2C0_IRQHandler(void)
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{
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uint32_t u32Status;
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u32Status = I2C_GET_STATUS(I2C0);
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if(I2C_GET_TIMEOUT_FLAG(I2C0))
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{
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/* Clear I2C0 Timeout Flag */
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I2C_ClearTimeoutFlag(I2C0);
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}
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else
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{
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if(s_I2CHandlerFn != NULL)
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s_I2CHandlerFn(u32Status);
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}
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}
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int main(){
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HalInit();
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Init_LCD();
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clear_LCD();
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print_Line(0, "NuTiny - Nano102");
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print_Line(1, "Cortex-M0 @32MHz");
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print_Line(2, "Ultra Low Power ");
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print_Line(3, "0.96 OLED 128x64");
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print_C(0, 0, 'N');
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print_C(0, 1, 'C');
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print_C(0, 2, 'U');
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print_C(0, 3, ' ');
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while(1){
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print_C(0, 2, 'U');
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}
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return 0;
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} |