La Suno
I2C hang recover function added
Dependencies: UniGraphic mbed vt100
In this version, check_i2c_pins function was added in edge_mgr.cpp.
プログラムの起動時、I2Cモジュールを初期化する前に、I2Cに使用するピンの電位を確認し
もし一方でも Low に張り付いていた場合、SCL を GPIO 出力に設定して
所定回数 (I2C_UNLOCK_TRIAL_CYCLE) 反転させることにより、疑似リセットクロックを生成します。
その後は、通常の起動手順に復帰し、以降はこれまでと同様の動作をします。
Diff: sensors/LM75B.h
- Revision:
- 0:d895cd1cd897
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sensors/LM75B.h Tue Apr 03 08:30:29 2018 +0000
@@ -0,0 +1,104 @@
+#ifndef _LM75B_H_
+#define _LM75B_H_
+
+#include "mbed.h"
+
+/**
+* NXP LM75B Digital temperature sensor and thermal watchdog
+*
+* @code
+#include "mbed.h"
+#include "LM75B.h"
+#define LM75B_I2C_ADDRESS (0x48)
+
+#if defined (TARGET_KL25Z)
+#define PIN_SCL PTE1
+#define PIN_SDA PTE0
+#elif defined (TARGET_KL46Z)
+#define PIN_SCL PTE1
+#define PIN_SDA PTE0
+#elif defined (TARGET_K64F)
+#define PIN_SCL PTE24
+#define PIN_SDA PTE25
+#elif defined (TARGET_K22F)
+#define PIN_SCL PTE1
+#define PIN_SDA PTE0
+#elif defined (TARGET_KL05Z)
+#define PIN_SCL PTB3
+#define PIN_SDA PTB4
+#elif defined (TARGET_NUCLEO_F411RE)
+#define PIN_SCL PB_8
+#define PIN_SDA PB_9
+#else
+ #error TARGET NOT DEFINED
+#endif
+
+int main() {
+ int8_t itemp = 0 ;
+ float ftemp = 0.0 ;
+ LM75B lm75b(PIN_SDA, PIN_SCL, LM75B_I2C_ADDRESS) ;
+
+ while(1) {
+ itemp = lm75b.temp() ;
+ lm75b.getTemp(&ftemp) ;
+ printf("Temp = %d C degree, %.3f C degree\n", itemp, ftemp) ;
+ wait(1) ;
+ }
+}
+* @endcode
+*/
+class LM75B
+{
+public:
+ /**
+ * LM75B constructor
+ *
+ * @param i2c pointer to the I2C object
+ * @param addr addr of the I2C peripheral
+ */
+ LM75B(I2C *i2c, int addr);
+
+ /**
+ * LM75B destructor
+ */
+ ~LM75B();
+
+ /**
+ * get temperature as one byte (signed)
+ * @param *temp int8_t returns integer part of the temperature
+ * @return 0: success not-0: failure
+ */
+ int temp(int8_t *temp) ;
+
+ /**
+ * get temperature as 11 bit (float)
+ * @param *temp float returns the temperature as float
+ * @return 0: success not-0: failure
+ */
+ int getTemp(float *temp) ;
+
+ /**
+ * get configuration register
+ * @param ptr_byte uint8_t pointer value for the register
+ * @param *config_data uint8_t value of the config register
+ * @return 0: success non-0: failure
+ */
+ int getConfig(uint8_t ptr_byte, uint8_t *config_data) ;
+
+ /**
+ * set configuration register
+ * @param ptr_byte uint8_t pointer value for the register
+ * @param config_data uint8_t value to set in the config register
+ * @return 0: success non-0: failure
+ */
+ int setConfig(uint8_t ptr_byte, uint8_t config_data) ;
+
+private:
+ I2C *p_i2c;
+ int m_addr;
+ int readRegs(int addr, uint8_t * data, int len);
+ int writeRegs(uint8_t * data, int len);
+
+};
+
+#endif
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