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chg: i2c - don't mix different communications layers when reporting data back

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This commit is contained in:
Chris 2018-07-08 10:50:05 +02:00
parent ba1ccf1994
commit ef318b56ec
1 changed files with 22 additions and 27 deletions
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47
common/i2c.c
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@ -170,18 +170,6 @@ bool I2C_WaitForSim() {
}
// send i2c STOP
/*
void I2C_Stop(void) {
SCL_L; I2C_DELAY_2CLK;
SDA_L; I2C_DELAY_2CLK;
SCL_H; I2C_DELAY_2CLK;
SDA_H;
I2C_DELAY_2CLK;
I2C_DELAY_2CLK;
I2C_DELAY_2CLK;
I2C_DELAY_2CLK;
}
*/
void I2C_Stop(void) {
SCL_L; I2C_DELAY_2CLK;
SDA_L; I2C_DELAY_2CLK;
@ -371,9 +359,9 @@ uint8_t I2C_BufferRead(uint8_t *data, uint8_t len, uint8_t device_cmd, uint8_t d
// extra wait 500us (514us measured)
// 200us (xx measured)
SpinDelayUs(200);
bool bBreak = true;
uint8_t readcount = 0;
do {
if (!I2C_Start())
return 0;
@ -404,20 +392,26 @@ uint8_t I2C_BufferRead(uint8_t *data, uint8_t len, uint8_t device_cmd, uint8_t d
// reading
while (len) {
len--;
*data = I2C_ReadByte();
// 读取的第一个字节为后续长度
// The first byte read is the message length
if (!readcount && (len > *data))
len = *data;
*data = I2C_ReadByte();
len--;
// 读取的第一个字节为后续长度
// The first byte in response is the message length
if (!readcount && (len > *data)) {
if ( MF_DBGLEVEL > 3 ) Dbprintf("Old len %d , Repsonse message len %d", len, *data);
len = *data;
} else {
data++;
}
readcount++;
// acknowledgements. After last byte send NACK.
if (len == 0)
I2C_NoAck();
else
I2C_Ack();
data++;
readcount++;
}
I2C_Stop();
@ -466,16 +460,17 @@ uint8_t I2C_ReadFW(uint8_t *data, uint8_t len, uint8_t msb, uint8_t lsb, uint8_t
// reading
while (len) {
len--;
*data = I2C_ReadByte();
data++;
readcount++;
len--;
// acknowledgements. After last byte send NACK.
if (len == 0)
I2C_NoAck();
else
I2C_Ack();
data++;
readcount++;
}
I2C_Stop();