alexey.zholtikov/avr-i2c-library
1
0
Fork 0
mirror of https://github.com/Sovichea/avr-i2c-library.git synced 2025-10-16 07:54:47 +03:00
Code Issues Packages Projects Releases Wiki Activity

Small fixes

Browse Source
This commit is contained in:
Sovichea Tep
2019-07-14 12:52:48 +07:00
parent 34b88ad099
commit deded68b9e
2 changed files with 38 additions and 38 deletions
Download Patch File Download Diff File Expand all files Collapse all files

66
twi/twi_master.c
View File

@@ -1,18 +1,18 @@
/* /*
* twi_master.c * twi_master.c
* *
* Created: 09-Jun-19 11:20:17 AM * Created: 09-Jun-19 11:20:17 AM
* Author: TEP SOVICHEA * Author: TEP SOVICHEA
*/ */
#include "twi_master.h" #include "twi_master.h"
static ret_code_t tw_start(void) static ret_code_t tw_start(void)
{ {
/* Send START condition */ /* Send START condition */
#if DEBUG_LOG #if DEBUG_LOG
printf(BG "Send START condition..." RESET); printf(BG "Send START condition..." RESET);
#endif #endif
TWCR = (1 << TWINT) | (1 << TWEN) | (1 << TWSTA); TWCR = (1 << TWINT) | (1 << TWEN) | (1 << TWSTA);
/* Wait for TWINT flag to set */ /* Wait for TWINT flag to set */
@@ -21,15 +21,15 @@ static ret_code_t tw_start(void)
/* Check error */ /* Check error */
if (TW_STATUS != TW_START && TW_STATUS != TW_REP_START) if (TW_STATUS != TW_START && TW_STATUS != TW_REP_START)
{ {
#if DEBUG_LOG #if DEBUG_LOG
printf("\n"); printf("\n");
#endif #endif
return TW_STATUS; return TW_STATUS;
} }
#if DEBUG_LOG #if DEBUG_LOG
printf("SUCCESS\n"); printf("SUCCESS\n");
#endif #endif
return SUCCESS; return SUCCESS;
} }
@@ -37,9 +37,9 @@ static ret_code_t tw_start(void)
static void tw_stop(void) static void tw_stop(void)
{ {
/* Send STOP condition */ /* Send STOP condition */
#if DEBUG_LOG #if DEBUG_LOG
puts(BG "Send STOP condition." RESET); puts(BG "Send STOP condition." RESET);
#endif #endif
TWCR = (1 << TWINT) | (1 << TWEN) | (1 << TWSTO); TWCR = (1 << TWINT) | (1 << TWEN) | (1 << TWSTO);
} }
@@ -47,9 +47,9 @@ static void tw_stop(void)
static ret_code_t tw_write_sla(uint8_t sla) static ret_code_t tw_write_sla(uint8_t sla)
{ {
/* Transmit slave address with read/write flag */ /* Transmit slave address with read/write flag */
#if DEBUG_LOG #if DEBUG_LOG
printf(BG "Write SLA + R/W: 0x%02X..." RESET, sla); printf(BG "Write SLA + R/W: 0x%02X..." RESET, sla);
#endif #endif
TWDR = sla; TWDR = sla;
TWCR = (1 << TWINT) | (1 << TWEN); TWCR = (1 << TWINT) | (1 << TWEN);
@@ -57,15 +57,15 @@ static ret_code_t tw_write_sla(uint8_t sla)
while (!(TWCR & (1 << TWINT))); while (!(TWCR & (1 << TWINT)));
if (TW_STATUS != TW_MT_SLA_ACK && TW_STATUS != TW_MR_SLA_ACK) if (TW_STATUS != TW_MT_SLA_ACK && TW_STATUS != TW_MR_SLA_ACK)
{ {
#if DEBUG_LOG #if DEBUG_LOG
printf("\n"); printf("\n");
#endif #endif
return TW_STATUS; return TW_STATUS;
} }
#if DEBUG_LOG #if DEBUG_LOG
printf("SUCCESS\n"); printf("SUCCESS\n");
#endif #endif
return SUCCESS; return SUCCESS;
} }
@@ -73,9 +73,9 @@ static ret_code_t tw_write_sla(uint8_t sla)
static ret_code_t tw_write(uint8_t data) static ret_code_t tw_write(uint8_t data)
{ {
/* Transmit 1 byte*/ /* Transmit 1 byte*/
#if DEBUG_LOG #if DEBUG_LOG
printf(BG "Write data byte: 0x%02X..." RESET, data); printf(BG "Write data byte: 0x%02X..." RESET, data);
#endif #endif
TWDR = data; TWDR = data;
TWCR = (1 << TWINT) | (1 << TWEN); TWCR = (1 << TWINT) | (1 << TWEN);
@@ -83,15 +83,15 @@ static ret_code_t tw_write(uint8_t data)
while (!(TWCR & (1 << TWINT))); while (!(TWCR & (1 << TWINT)));
if (TW_STATUS != TW_MT_DATA_ACK) if (TW_STATUS != TW_MT_DATA_ACK)
{ {
#if DEBUG_LOG #if DEBUG_LOG
printf("\n"); printf("\n");
#endif #endif
return TW_STATUS; return TW_STATUS;
} }
#if DEBUG_LOG #if DEBUG_LOG
printf("SUCCESS\n"); printf("SUCCESS\n");
#endif #endif
return SUCCESS; return SUCCESS;
} }
@@ -117,9 +117,9 @@ static uint8_t tw_read(bool read_ack)
} }
} }
uint8_t data = TWDR; uint8_t data = TWDR;
#if DEBUG_LOG #if DEBUG_LOG
printf(BG "Read data byte: 0x%02X\n" RESET, data); printf(BG "Read data byte: 0x%02X\n" RESET, data);
#endif #endif
return data; return data;
} }
@@ -129,9 +129,9 @@ void tw_init(twi_freq_mode_t twi_freq_mode, bool pullup_en)
DDRC |= (1 << TW_SDA_PIN) | (1 << TW_SCL_PIN); DDRC |= (1 << TW_SDA_PIN) | (1 << TW_SCL_PIN);
if (pullup_en) if (pullup_en)
{ {
#if DEBUG_LOG #if DEBUG_LOG
puts(BG "Enable pull-up resistor." RESET); puts(BG "Enable pull-up resistor." RESET);
#endif #endif
PORTC |= (1 << TW_SDA_PIN) | (1 << TW_SCL_PIN); PORTC |= (1 << TW_SDA_PIN) | (1 << TW_SCL_PIN);
} }
else else
@@ -147,10 +147,10 @@ void tw_init(twi_freq_mode_t twi_freq_mode, bool pullup_en)
SCL_freq = 16MHz/(16 + 2*72*1) = 100KHz */ SCL_freq = 16MHz/(16 + 2*72*1) = 100KHz */
TWBR = 72; TWBR = 72;
break; break;
case TW_FREQ_250K: case TW_FREQ_250K:
/* Set bit rate register 24 and prescaler to 1 resulting in /* Set bit rate register 24 and prescaler to 1 resulting in
SCL_freq = 16MHz/(16 + 2*24*1) = 250KHz */ SCL_freq = 16MHz/(16 + 2*24*1) = 250KHz */
TWBR = 24; TWBR = 24;
break; break;
@@ -185,7 +185,7 @@ ret_code_t tw_master_transmit(uint8_t slave_addr, uint8_t* p_data, uint8_t len,
/* Send data byte in single or burst mode */ /* Send data byte in single or burst mode */
for (int i = 0; i < len; ++i) for (int i = 0; i < len; ++i)
{ {
error_code = tw_write(p_data[i]); error_code = tw_write(p_data[i]);
if (error_code != SUCCESS) if (error_code != SUCCESS)
{ {

10
twi/twi_master.h
View File

@@ -1,9 +1,9 @@
/* /*
* twi_master.h * twi_master.h
* *
* Created: 09-Jun-19 11:20:04 AM * Created: 09-Jun-19 11:20:04 AM
* Author: TEP SOVICHEA * Author: TEP SOVICHEA
*/ */
#ifndef TWI_MASTER_H_ #ifndef TWI_MASTER_H_