La Suno / Mbed 2 deprecated afero_poc15_180403

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。

sensors/LM75B.cpp@0:d895cd1cd897, 2018-04-03 (annotated)

Committer:
Rhyme
Date:
Tue Apr 03 08:30:29 2018 +0000
Revision:
0:d895cd1cd897
Initial I2C Pin force reset function added

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Rhyme 0:d895cd1cd897 1 #include "mbed.h"
Rhyme 0:d895cd1cd897 2 #include "LM75B.h"
Rhyme 0:d895cd1cd897 3 #include "af_mgr.h"
Rhyme 0:d895cd1cd897 4
Rhyme 0:d895cd1cd897 5 /* Register list */
Rhyme 0:d895cd1cd897 6 #define PTR_CONF 0x01
Rhyme 0:d895cd1cd897 7 #define PTR_TEMP 0x00
Rhyme 0:d895cd1cd897 8 #define PTR_TOS 0x03
Rhyme 0:d895cd1cd897 9 #define PTR_THYST 0x02
Rhyme 0:d895cd1cd897 10
Rhyme 0:d895cd1cd897 11 /* Configuration register */
Rhyme 0:d895cd1cd897 12 /* B[7:5] : Reserved */
Rhyme 0:d895cd1cd897 13 /* B[4:3] : OS_F_QUE[1:0] OS fault queue value */
Rhyme 0:d895cd1cd897 14 #define CONFIG_QUE_1 0x00
Rhyme 0:d895cd1cd897 15 #define CONFIG_QUE_2 (0x01 << 3)
Rhyme 0:d895cd1cd897 16 #define CONFIG_QUE_4 (0x10 << 3)
Rhyme 0:d895cd1cd897 17 #define CONFIG_QUE_6 (0x11 << 3)
Rhyme 0:d895cd1cd897 18 /* B[2] : OS_POL 0 = OS active LOW, 1 = OS active HIGH */
Rhyme 0:d895cd1cd897 19 #define CONFIG_OS_POL_L 0x00
Rhyme 0:d895cd1cd897 20 #define CONFIG_OS_POL_H (0x01 << 2)
Rhyme 0:d895cd1cd897 21 /* B[1] : OS_COMP_INT 0 = OS comparator, 1 = OS interrupt */
Rhyme 0:d895cd1cd897 22 #define CONFIG_OS_COMP 0x00
Rhyme 0:d895cd1cd897 23 #define CONFIG_OS_INT (0x01 << 1)
Rhyme 0:d895cd1cd897 24 /* B[0] : SHUTDOWN 0 = normal, 1 = shutdown */
Rhyme 0:d895cd1cd897 25 #define CONFIG_NORMARL 0x00
Rhyme 0:d895cd1cd897 26 #define CONFIG_SHUTDOWN 0x01
Rhyme 0:d895cd1cd897 27
Rhyme 0:d895cd1cd897 28 /* Temperature register */
Rhyme 0:d895cd1cd897 29 /* D[15:5] = 11 bit data 0.125 * temp data */
Rhyme 0:d895cd1cd897 30 /* D[4:0] : reserved */
Rhyme 0:d895cd1cd897 31
Rhyme 0:d895cd1cd897 32 /* Tos register */
Rhyme 0:d895cd1cd897 33 /* D[15:7] = 9 bit data */
Rhyme 0:d895cd1cd897 34 /* D[6:0] : reserved */
Rhyme 0:d895cd1cd897 35
Rhyme 0:d895cd1cd897 36 /* Thyst register */
Rhyme 0:d895cd1cd897 37 /* D[15:7] = 9 ibt data */
Rhyme 0:d895cd1cd897 38 /* D[6:0] : reserved */
Rhyme 0:d895cd1cd897 39
Rhyme 0:d895cd1cd897 40 LM75B::LM75B(I2C *i2c, int addr) : m_addr(addr<<1) {
Rhyme 0:d895cd1cd897 41 p_i2c = i2c ;
Rhyme 0:d895cd1cd897 42 p_i2c->frequency(100000); /* 100kHz */
Rhyme 0:d895cd1cd897 43 // activate the peripheral
Rhyme 0:d895cd1cd897 44 }
Rhyme 0:d895cd1cd897 45
Rhyme 0:d895cd1cd897 46 LM75B::~LM75B() { }
Rhyme 0:d895cd1cd897 47
Rhyme 0:d895cd1cd897 48 int LM75B::temp(int8_t *temp)
Rhyme 0:d895cd1cd897 49 {
Rhyme 0:d895cd1cd897 50 int result ;
Rhyme 0:d895cd1cd897 51 char t[1] = { 0x00 } ;
Rhyme 0:d895cd1cd897 52 result = p_i2c->write(m_addr, t, 1, true) ;
Rhyme 0:d895cd1cd897 53 if (result == 0) {
Rhyme 0:d895cd1cd897 54 result = p_i2c->read(m_addr, t, 1) ;
Rhyme 0:d895cd1cd897 55 }
Rhyme 0:d895cd1cd897 56 if (result == 0) {
Rhyme 0:d895cd1cd897 57 *temp = (int8_t)t[0] ;
Rhyme 0:d895cd1cd897 58 }
Rhyme 0:d895cd1cd897 59 return( result ) ;
Rhyme 0:d895cd1cd897 60 }
Rhyme 0:d895cd1cd897 61
Rhyme 0:d895cd1cd897 62 int LM75B::getTemp(float *temp)
Rhyme 0:d895cd1cd897 63 {
Rhyme 0:d895cd1cd897 64 int result ;
Rhyme 0:d895cd1cd897 65 char t[2] = { 0, 0 } ;
Rhyme 0:d895cd1cd897 66 int16_t iTemp = 0 ;
Rhyme 0:d895cd1cd897 67 result = p_i2c->write(m_addr, t, 1) ; /* write pointer byte 0x00 */
Rhyme 0:d895cd1cd897 68 if (result == 0) {
Rhyme 0:d895cd1cd897 69 result = p_i2c->read(m_addr, t, 2) ; /* read MSB, LSB */
Rhyme 0:d895cd1cd897 70 }
Rhyme 0:d895cd1cd897 71 if (result == 0) {
Rhyme 0:d895cd1cd897 72 iTemp = (t[0] << 8) | t[1] ;
Rhyme 0:d895cd1cd897 73 iTemp >>= 5 ;
Rhyme 0:d895cd1cd897 74 *temp = 0.125 * iTemp ;
Rhyme 0:d895cd1cd897 75 }
Rhyme 0:d895cd1cd897 76 return( result ) ;
Rhyme 0:d895cd1cd897 77 }
Rhyme 0:d895cd1cd897 78
Rhyme 0:d895cd1cd897 79 int LM75B::getConfig(uint8_t ptr_byte, uint8_t *config_data)
Rhyme 0:d895cd1cd897 80 {
Rhyme 0:d895cd1cd897 81 int result ;
Rhyme 0:d895cd1cd897 82 char config = 0x00 ; /* default value */
Rhyme 0:d895cd1cd897 83 result = p_i2c->write(m_addr, (char*)(&ptr_byte), 1, true) ;
Rhyme 0:d895cd1cd897 84 if (result == 0) {
Rhyme 0:d895cd1cd897 85 result = p_i2c->read(m_addr, &config, 1) ;
Rhyme 0:d895cd1cd897 86 }
Rhyme 0:d895cd1cd897 87 if (result == 0) {
Rhyme 0:d895cd1cd897 88 *config_data = config ;
Rhyme 0:d895cd1cd897 89 }
Rhyme 0:d895cd1cd897 90 return( result ) ;
Rhyme 0:d895cd1cd897 91 }
Rhyme 0:d895cd1cd897 92
Rhyme 0:d895cd1cd897 93 int LM75B::setConfig(uint8_t ptr_byte, uint8_t config_data)
Rhyme 0:d895cd1cd897 94 {
Rhyme 0:d895cd1cd897 95 int result ;
Rhyme 0:d895cd1cd897 96 char t[2] ;
Rhyme 0:d895cd1cd897 97 t[0] = ptr_byte ;
Rhyme 0:d895cd1cd897 98 t[1] = config_data ;
Rhyme 0:d895cd1cd897 99 result = p_i2c->write(m_addr, t, 2, true) ;
Rhyme 0:d895cd1cd897 100 return( result ) ;
Rhyme 0:d895cd1cd897 101 }
Rhyme 0:d895cd1cd897 102
Rhyme 0:d895cd1cd897 103 int LM75B::readRegs(int addr, uint8_t * data, int len)
Rhyme 0:d895cd1cd897 104 {
Rhyme 0:d895cd1cd897 105 int result ;
Rhyme 0:d895cd1cd897 106 char t[1] = {addr};
Rhyme 0:d895cd1cd897 107 __disable_irq() ; // Disable Interrupts
Rhyme 0:d895cd1cd897 108 result = p_i2c->write(m_addr, t, 1, true);
Rhyme 0:d895cd1cd897 109 if (result == 0) {
Rhyme 0:d895cd1cd897 110 result = p_i2c->read(m_addr, (char *)data, len);
Rhyme 0:d895cd1cd897 111 }
Rhyme 0:d895cd1cd897 112 __enable_irq() ; // Enable Interrupts
Rhyme 0:d895cd1cd897 113 return( result ) ;
Rhyme 0:d895cd1cd897 114 }
Rhyme 0:d895cd1cd897 115
Rhyme 0:d895cd1cd897 116 int LM75B::writeRegs(uint8_t * data, int len) {
Rhyme 0:d895cd1cd897 117 int result ;
Rhyme 0:d895cd1cd897 118 __disable_irq() ; // Disable Interrupts
Rhyme 0:d895cd1cd897 119 result = p_i2c->write(m_addr, (char *)data, len);
Rhyme 0:d895cd1cd897 120 __enable_irq() ; // Enable Interrupts
Rhyme 0:d895cd1cd897 121 return( result ) ;
Rhyme 0:d895cd1cd897 122 }