[问答]

STM8L151上的I2C无法通过发送地址部分

问答对人有帮助，内容完整，我也想知道答案 0 您好，我尝试在i2c上提取外设库样本，使其更易于使用。但是，奇怪的是我无法通过发送地址部分，并且无法弄清楚原因。有人可以给我指点吗？附件是我使用的代码，有问题的行是在 ''while（！I2C_CheckEvent（I2C1，I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED））''在readRegistry函数中。谢谢。以上来自于谷歌翻译以下为原文 Hello, I tried distilling the peripheral library sample on i2c to make it simpler for my own use. However, strangely I cannot get pass a the send address part, and can't figure out why. Can someone give me some direction? Attached is the code I used, and the line with problem is at ''while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) '' inside readRegistry function. Thanks. #include ''stm8l15x.h'' void initI2C(void); uint16_t readRegistry(uint8_t address, uint8_t reg); #define HMC5883_ADDR (0x1E) #define I2C_SPEED 100000 /!< I2C Speed / #define I2C_SCL_PIN GPIO_Pin_1 /* PC.01 / #define I2C_SCL_GPIO_PORT GPIOC / GPIOC / #define I2C_SDA_PIN GPIO_Pin_0 / PC.00 / #define I2C_SDA_GPIO_PORT GPIOC / GPIOC / void main(void) { CLK_SYSCLKDivConfig(CLK_SYSCLKDiv_1); enableInterrupts(); initI2C(); readRegistry(HMC5883_ADDR, 4); while (1) { } } void initI2C(void) { GPIO_Init(GPIOC, GPIO_Pin_0, GPIO_Mode_Out_OD_HiZ_Fast); GPIO_Init(GPIOC, GPIO_Pin_1, GPIO_Mode_Out_OD_HiZ_Fast); CLK_PeripheralClockConfig(CLK_Peripheral_I2C1, ENABLE); I2C_Init(I2C1, I2C_SPEED, 0xA0, I2C_Mode_I2C, I2C_DutyCycle_2, I2C_Ack_Enable, I2C_AcknowledgedAddress_7bit); I2C_ITConfig(I2C1, I2C_IT_ERR, ENABLE); I2C_Cmd(I2C1, ENABLE); } uint16_t readRegistry(uint8_t address, uint8_t reg) { uint16_t RegValue=0; I2C_AcknowledgeConfig(I2C1, DISABLE); I2C_GenerateSTART(I2C1, ENABLE); while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT)) / EV5 / { } I2C_Send7bitAddress(I2C1, address, I2C_Direction_Transmitter); while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) / EV6 <--- EVERYTHING STOPS HERE / { } I2C_SendData(I2C1, reg); while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED)) / EV8 / { } I2C_GenerateSTART(I2C1, ENABLE); while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT)) / EV5 / { } I2C_Send7bitAddress(I2C1, address, I2C_Direction_Receiver); while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED)) / EV6 / { } while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED)) / EV7 */ { } RegValue = I2C_ReceiveData(I2C1); I2C_AcknowledgeConfig(I2C1, DISABLE); I2C_GenerateSTOP(I2C1, ENABLE); while (I2C_GetFlagStatus(I2C1, I2C_FLAG_RXNE) == RESET) {} return RegValue; } 0
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答案对人有帮助，有参考价值 0 我有同样的问题。我使用STM8L Discovery控制DS1307，当我发送（）函数时它很好但是当我发送（）函数时，I2C1-＆gt; DR = ----它没有得到值而I2C1-＆gt; SR1（ADDR）位是没有设置。因为它没有出来 ; // EV6。有人可以帮我解决问题吗？ PS：我在IAR上调试以上来自于谷歌翻译以下为原文 I have same problem. I use STM8L Discovery control DS1307, when I send I2C_GenerateSTART () function it's good but when I send I2C_Send7bitAddress () function, I2C1->DR = ---- it doesn't get value and I2C1->SR1 (ADDR) bit is not set. Because it doesn't get out while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) ; //EV6. Can someone help me to solver problem ? PS: i debug on IAR

2018-11-5 10:20:46 评论举报徐娟

答案对人有帮助，有参考价值 0 嗨winix，看来你的芯片没有得到确认。如果你的地址真的是0x1E，你必须将它向左移1位，否则它将被传输为0xF。如果这不起作用，您可以尝试降低速度。祝你好运。以上来自于谷歌翻译以下为原文 Hi winix, It seems that you do not get ACK from your chip. If your address is really 0x1E, you must shift it 1 bit left, otherwise it will be transmitted as 0xF. If that does not work you can try to reduce the speed. Good luck.

2018-11-5 10:36:36 评论举报李熙国