[问答]

NUC 240 smbus I2C_WAIT_READY(i2c) 无法执行程序是为什么？

问答对人有帮助，内容完整，我也想知道答案 0 我在网站上找到关于 SMBUS 的相关的程式, 因此复製下来放在 NUC 240 环境下执行, 却都在当在指令 I2C_WAIT_READY(i2c) 无法继续执行, 却不知为何? 不知是否可以帮帮忙解决问题, 感恩不尽. 我的设备位置是 0x16, 功能编号位址为 0x03, 传回资料位元组 2 byte, 程式码如下: #include #include "NUC230_240.h" #define PLLCON_SETtiNG SYSCLK_PLLCON_50MHz_XTAL #define PLL_CLOCK 50000000 volatile uint8_t g_u8DeviceAddr; volatile uint8_t g_au8TxData[3]; volatile uint8_t g_u8RxData; volatile uint8_t g_u8DataLen; volatile uint8_t g_u8EndFlag = 0; typedef void (I2C_FUNC)(uint32_t u32Status); static I2C_FUNC s_I2C0HandlerFn = NULL; void I2C0_IRQHandler(void) { uint32_t u32Status; u32Status = I2C_GET_STATUS(I2C0); if(I2C_GET_TIMEOUT_FLAG(I2C0)) { / Clear I2C0 Timeout Flag / I2C_ClearTimeoutFlag(I2C0); } else { if(s_I2C0HandlerFn != NULL) s_I2C0HandlerFn(u32Status); } } void I2C_MasterRx(uint32_t u32Status) { if(u32Status == 0x08) { I2C_SET_DATA(I2C0, (g_u8DeviceAddr << 1)); I2C_SET_CONTROL_REG(I2C0, I2C_I2CON_SI); } else if(u32Status == 0x18) { I2C_SET_DATA(I2C0, g_au8TxData[g_u8DataLen++]); I2C_SET_CONTROL_REG(I2C0, I2C_I2CON_SI); } else if(u32Status == 0x20) { I2C_SET_CONTROL_REG(I2C0, I2C_I2CON_STA_STO_SI); } else if(u32Status == 0x28) { if(g_u8DataLen != 2) { I2C_SET_DATA(I2C0, g_au8TxData[g_u8DataLen++]); I2C_SET_CONTROL_REG(I2C0, I2C_I2CON_SI); } else { I2C_SET_CONTROL_REG(I2C0, I2C_I2CON_STA_SI); } } else if(u32Status == 0x10) { I2C_SET_DATA(I2C0, ((g_u8DeviceAddr << 1) \| 0x01)); I2C_SET_CONTROL_REG(I2C0, I2C_I2CON_SI); } else if(u32Status == 0x40) { I2C_SET_CONTROL_REG(I2C0, I2C_I2CON_SI); } else if(u32Status == 0x58) { g_u8RxData = (unsigned char) I2C_GET_DATA(I2C0); I2C_SET_CONTROL_REG(I2C0, I2C_I2CON_STO_SI); g_u8EndFlag = 1; } else { printf("Status 0x%x is NOT processed\n", u32Status); } } void I2C_MasterTx(uint32_t u32Status) { if(u32Status == 0x08) { I2C_SET_DATA(I2C0, g_u8DeviceAddr << 1); I2C_SET_CONTROL_REG(I2C0, I2C_I2CON_SI); } else if(u32Status == 0x18) { I2C_SET_DATA(I2C0, g_au8TxData[g_u8DataLen++]); I2C_SET_CONTROL_REG(I2C0, I2C_I2CON_SI); } else if(u32Status == 0x20) { I2C_SET_CONTROL_REG(I2C0, I2C_I2CON_STA_STO_SI); } else if(u32Status == 0x28) { if(g_u8DataLen != 3) { I2C_SET_DATA(I2C0, g_au8TxData[g_u8DataLen++]); I2C_SET_CONTROL_REG(I2C0, I2C_I2CON_SI); } else { I2C_SET_CONTROL_REG(I2C0, I2C_I2CON_STO_SI); g_u8EndFlag = 1; } } else { / TO DO / printf("Status 0x%x is NOT processed\n", u32Status); } } void SYS_Init(void) { / Enable Internal RC 22.1184MHz clock / CLK_EnableXtalRC(CLK_PWRCON_OSC22M_EN_Msk); / Waiting for Internal RC clock ready / CLK_WaitClockReady(CLK_CLKSTATUS_OSC22M_STB_Msk); / Switch HCLK clock source to Internal RC and HCLK source divide 1 / CLK_SetHCLK(CLK_CLKSEL0_HCLK_S_HIRC, CLK_CLKDIV_HCLK(1)); / Enable external XTAL 12MHz clock / CLK_EnableXtalRC(CLK_PWRCON_XTL12M_EN_Msk); / Waiting for external XTAL clock ready / CLK_WaitClockReady(CLK_CLKSTATUS_XTL12M_STB_Msk); / Set core clock as PLL_CLOCK from PLL / CLK_SetCoreClock(PLL_CLOCK); / Enable UART module clock / CLK_EnableModuleClock(UART0_MODULE); / Enable I2C0 module clock / CLK_EnableModuleClock(I2C0_MODULE); / Select UART module clock source / CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UART_S_HXT, CLK_CLKDIV_UART(1)); / Set GPB multi-function pins for UART0 RXD and TXD / SYS->GPB_MFP = SYS_GPB_MFP_PB0_UART0_RXD \| SYS_GPB_MFP_PB1_UART0_TXD; / Set GPA multi-function pins for I2C0 SDA and SCL / SYS->GPA_MFP = SYS_GPA_MFP_PA8_I2C0_SDA \| SYS_GPA_MFP_PA9_I2C0_SCL; } void UART0_Init() { / Reset IP / SYS_ResetModule(UART0_RST); / Configure UART0 and set UART0 Baudrate / UART_Open(UART0, 115200); } void I2C0_Close(void) { / Disable I2C0 interrupt and clear corresponding NVIC bit / I2C_DisableInt(I2C0); NVIC_DisableIRQ(I2C0_IRQn); / Disable I2C0 and close I2C0 clock / I2C_Close(I2C0); CLK_DisableModuleClock(I2C0_MODULE); } void I2C0_Init(void) { / Open I2C module and set bus clock / I2C_Open(I2C0, 80000); //BaudRate 80k, 100000 => 100K / Get I2C0 Bus Clock / printf("I2C clock %d Hz\n", I2C_GetBusClockFreq(I2C0)); / Set I2C 4 Slave Addresses / I2C_SetSlaveAddr(I2C0, 0, 0x1ˊ6, 0); / Slave Address : 0x15 / / Enable I2C interrupt / I2C_EnableInt(I2C0); NVIC_EnableIRQ(I2C0_IRQn); } uint8_t I2C_WriteByteTwoRegs(I2C_T i2c, uint8_t u8SlaveAddr, uint16_t u16DataAddr, const uint8_t data) { uint8_t u8Xfering = 1, u8Err = 0, u8Addr = 1, u8Ctrl = 0; uint32_t u32txLen = 0; I2C_START(i2c); while(u8Xfering (u8Err == 0)) { I2C_WAIT_READY(i2c); switch(I2C_GET_STATUS(i2c)) { case 0x08: I2C_SET_DATA(i2c, (u8SlaveAddr << 1 \| 0x00)); u8Ctrl = I2C_I2CON_SI; break; case 0x18: I2C_SET_DATA(i2c, (uint8_t)(u16DataAddr 0xFF00) >> 8); break; case 0x20: case 0x30: u8Ctrl = I2C_I2CON_STO_SI; u8Err = 1; break; case 0x28: if(u8Addr) { I2C_SET_DATA(i2c, (uint8_t)(u16DataAddr 0xFF)); u8Addr = 0; } else if((u32txLen < 1) (u8Addr == 0)) { I2C_SET_DATA(i2c, data); u32txLen++; } else { u8Ctrl = I2C_I2CON_STO_SI; u8Xfering = 0; } break; case 0x38: default: u8Ctrl = I2C_I2CON_STO_SI; u8Err = 1; break; } I2C_SET_CONTROL_REG(i2c, u8Ctrl); } return (u8Err \| u8Xfering); } uint8_t I2C_ReadByteTwoRegs(I2C_T i2c, uint8_t u8SlaveAddr, uint16_t u16DataAddr) { uint8_t u8Xfering = 1, u8Err = 0, rdata = 0, u8Addr = 1, u8Ctrl = 0; I2C_START(i2c); while(u8Xfering (u8Err == 0)) { switch(I2C_GET_STATUS(i2c)) { case 0x08: I2C_SET_DATA(i2c, (u8SlaveAddr << 1 \| 0x00)); u8Ctrl = I2C_I2CON_SI; //I2C_CTL_SI; break; case 0x18: I2C_SET_DATA(i2c, (uint8_t)(u16DataAddr 0xFF00) >> 8); break; case 0x20: case 0x30: u8Ctrl = I2C_I2CON_STO_SI; u8Err = 1; break; case 0x28: if(u8Addr) { I2C_SET_DATA(i2c, (uint8_t)(u16DataAddr 0xFF)); u8Addr = 0; } else u8Ctrl = I2C_I2CON_STA_SI; break; case 0x10: I2C_SET_DATA(i2c, ((u8SlaveAddr << 1) \| 0x01)); u8Ctrl = I2C_I2CON_SI; break; case 0x40: u8Ctrl = I2C_I2CON_SI; break; case 0x48: u8Ctrl = I2C_I2CON_STO_SI; u8Err = 1; break; case 0x58: rdata = (unsigned char) I2C_GET_DATA(i2c); u8Ctrl = I2C_I2CON_STO_SI; //I2C_CTL_STO_SI; u8Xfering = 0; break; case 0x38: default: u8Ctrl = I2C_I2CON_STO_SI; //I2C_CTL_STO_SI; u8Err = 1; break; // Arbitration Lost } I2C_SET_CONTROL_REG(i2c, u8Ctrl); } if(u8Err) rdata = 0; return rdata; } volatile uint8_t g_u8DeviceAddr; volatile uint32_t ret_code; volatile uint16_t u16DataAddr; int32_t main(void) { / Unlock protected registers / SYS_UnlockReg(); / Init System, IP clock and multi-function I/O / SYS_Init(); / Lock protected registers / SYS_LockReg(); / Init UART0 for printf */ UART0_Init(); printf("I2C0_SDA(PD.4), I2C0_SCL(PD.5)\n"); I2C0_Init(); ret_code = I2C_WriteByteTwoRegs(I2C0, 0x16, 0x03, 0x2); CLK_SysTickDelay(20000); g_u8DeviceAddr = 0x16; u16DataAddr = 0x0003; ret_code = I2C_ReadByteTwoRegs(I2C0, g_u8DeviceAddr, u16DataAddr); while(1); } 0
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