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-rwxr-xr-xdrivers/avr/i2c_master.c89
-rwxr-xr-xdrivers/avr/i2c_master.h2
-rw-r--r--drivers/avr/is31fl3731.c56
-rw-r--r--drivers/avr/is31fl3731.h10
4 files changed, 115 insertions, 42 deletions
diff --git a/drivers/avr/i2c_master.c b/drivers/avr/i2c_master.c
index cd3c2e1c81..97f6900436 100755
--- a/drivers/avr/i2c_master.c
+++ b/drivers/avr/i2c_master.c
@@ -6,6 +6,7 @@
#include <util/twi.h>
#include "i2c_master.h"
+#include "timer.h"
#define F_SCL 400000UL // SCL frequency
#define Prescaler 1
@@ -24,8 +25,18 @@ uint8_t i2c_start(uint8_t address)
TWCR = 0;
// transmit START condition
TWCR = (1<<TWINT) | (1<<TWSTA) | (1<<TWEN);
- // wait for end of transmission
- while( !(TWCR & (1<<TWINT)) );
+
+ #ifdef I2C_TIMEOUT
+ uint16_t timeout_timer = timer_read();
+ while( !(TWCR & (1<<TWINT)) ) {
+ if ((timer_read() - timeout_timer) > I2C_TIMEOUT) {
+ return 2; // should make these codes standard
+ }
+ }
+ #else
+ // wait for end of transmission
+ while( !(TWCR & (1<<TWINT)) );
+ #endif
// check if the start condition was successfully transmitted
if(((TW_STATUS & 0xF8) != TW_START) && ((TW_STATUS & 0xF8) != TW_REP_START)){ return 1; }
@@ -34,8 +45,18 @@ uint8_t i2c_start(uint8_t address)
TWDR = address;
// start transmission of address
TWCR = (1<<TWINT) | (1<<TWEN);
- // wait for end of transmission
- while( !(TWCR & (1<<TWINT)) );
+
+ #ifdef I2C_TIMEOUT
+ timeout_timer = timer_read();
+ while( !(TWCR & (1<<TWINT)) ) {
+ if ((timer_read() - timeout_timer) > I2C_TIMEOUT) {
+ return 2; // should make these codes standard
+ }
+ }
+ #else
+ // wait for end of transmission
+ while( !(TWCR & (1<<TWINT)) );
+ #endif
// check if the device has acknowledged the READ / WRITE mode
uint8_t twst = TW_STATUS & 0xF8;
@@ -50,8 +71,18 @@ uint8_t i2c_write(uint8_t data)
TWDR = data;
// start transmission of data
TWCR = (1<<TWINT) | (1<<TWEN);
+
+ #ifdef I2C_TIMEOUT
+ uint16_t timeout_timer = timer_read();
+ while( !(TWCR & (1<<TWINT)) ) {
+ if ((timer_read() - timeout_timer) > I2C_TIMEOUT) {
+ return 2; // should make these codes standard
+ }
+ }
+ #else
// wait for end of transmission
- while( !(TWCR & (1<<TWINT)) );
+ while( !(TWCR & (1<<TWINT)) );
+ #endif
if( (TW_STATUS & 0xF8) != TW_MT_DATA_ACK ){ return 1; }
@@ -63,8 +94,19 @@ uint8_t i2c_read_ack(void)
// start TWI module and acknowledge data after reception
TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWEA);
- // wait for end of transmission
- while( !(TWCR & (1<<TWINT)) );
+
+ #ifdef I2C_TIMEOUT
+ uint16_t timeout_timer = timer_read();
+ while( !(TWCR & (1<<TWINT)) ) {
+ if ((timer_read() - timeout_timer) > I2C_TIMEOUT) {
+ return 2; // should make these codes standard
+ }
+ }
+ #else
+ // wait for end of transmission
+ while( !(TWCR & (1<<TWINT)) );
+ #endif
+
// return received data from TWDR
return TWDR;
}
@@ -74,8 +116,19 @@ uint8_t i2c_read_nack(void)
// start receiving without acknowledging reception
TWCR = (1<<TWINT) | (1<<TWEN);
- // wait for end of transmission
- while( !(TWCR & (1<<TWINT)) );
+
+ #ifdef I2C_TIMEOUT
+ uint16_t timeout_timer = timer_read();
+ while( !(TWCR & (1<<TWINT)) ) {
+ if ((timer_read() - timeout_timer) > I2C_TIMEOUT) {
+ return 2; // should make these codes standard
+ }
+ }
+ #else
+ // wait for end of transmission
+ while( !(TWCR & (1<<TWINT)) );
+ #endif
+
// return received data from TWDR
return TWDR;
}
@@ -144,10 +197,22 @@ uint8_t i2c_readReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t le
return 0;
}
-void i2c_stop(void)
+uint8_t i2c_stop(void)
{
// transmit STOP condition
TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWSTO);
- // wait until stop condition is executed and bus released
- while(TWCR & (1<<TWSTO));
+
+ #ifdef I2C_TIMEOUT
+ uint16_t timeout_timer = timer_read();
+ while(TWCR & (1<<TWSTO)) {
+ if ((timer_read() - timeout_timer) > I2C_TIMEOUT) {
+ return 2; // should make these codes standard
+ }
+ }
+ #else
+ // wait for end of transmission
+ while(TWCR & (1<<TWSTO));
+ #endif
+
+ return 0;
}
diff --git a/drivers/avr/i2c_master.h b/drivers/avr/i2c_master.h
index 2479d28d52..8686807146 100755
--- a/drivers/avr/i2c_master.h
+++ b/drivers/avr/i2c_master.h
@@ -17,6 +17,6 @@ uint8_t i2c_transmit(uint8_t address, uint8_t* data, uint16_t length);
uint8_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length);
uint8_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length);
uint8_t i2c_readReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length);
-void i2c_stop(void);
+uint8_t i2c_stop(void);
#endif // I2C_MASTER_H
diff --git a/drivers/avr/is31fl3731.c b/drivers/avr/is31fl3731.c
index 13dfe6eaf6..158b77b7b1 100644
--- a/drivers/avr/is31fl3731.c
+++ b/drivers/avr/is31fl3731.c
@@ -78,18 +78,19 @@ bool g_led_control_registers_update_required = false;
// 0x10 - R16,R15,R14,R13,R12,R11,R10,R09
-void IS31FL3731_write_register( uint8_t addr, uint8_t reg, uint8_t data )
+uint8_t IS31FL3731_write_register( uint8_t addr, uint8_t reg, uint8_t data )
{
g_twi_transfer_buffer[0] = reg;
g_twi_transfer_buffer[1] = data;
//Transmit data until succesful
//while(i2c_transmit(addr << 1, g_twi_transfer_buffer,2) != 0);
- i2c_transmit(addr << 1, g_twi_transfer_buffer,2);
+ return i2c_transmit(addr << 1, g_twi_transfer_buffer,2);
}
-void IS31FL3731_write_pwm_buffer( uint8_t addr, uint8_t *pwm_buffer )
+uint8_t IS31FL3731_write_pwm_buffer( uint8_t addr, uint8_t *pwm_buffer )
{
+ uint8_t ret = 0;
// assumes bank is already selected
// transmit PWM registers in 9 transfers of 16 bytes
@@ -110,64 +111,67 @@ void IS31FL3731_write_pwm_buffer( uint8_t addr, uint8_t *pwm_buffer )
//Transmit buffer until succesful
//while(i2c_transmit(addr << 1, g_twi_transfer_buffer,17) != 0);
- i2c_transmit(addr << 1, g_twi_transfer_buffer,17);
-
+ ret |= i2c_transmit(addr << 1, g_twi_transfer_buffer, 17);
}
+ return ret;
}
-void IS31FL3731_init( uint8_t addr )
+uint8_t IS31FL3731_init( uint8_t addr )
{
+ uint8_t ret = 0;
// In order to avoid the LEDs being driven with garbage data
// in the LED driver's PWM registers, first enable software shutdown,
// then set up the mode and other settings, clear the PWM registers,
// then disable software shutdown.
// select "function register" bank
- IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, ISSI_BANK_FUNCTIONREG );
+ ret |= IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, ISSI_BANK_FUNCTIONREG );
// enable software shutdown
- IS31FL3731_write_register( addr, ISSI_REG_SHUTDOWN, 0x00 );
+ ret |= IS31FL3731_write_register( addr, ISSI_REG_SHUTDOWN, 0x00 );
// this delay was copied from other drivers, might not be needed
_delay_ms( 10 );
// picture mode
- IS31FL3731_write_register( addr, ISSI_REG_CONFIG, ISSI_REG_CONFIG_PICTUREMODE );
+ ret |= IS31FL3731_write_register( addr, ISSI_REG_CONFIG, ISSI_REG_CONFIG_PICTUREMODE );
// display frame 0
- IS31FL3731_write_register( addr, ISSI_REG_PICTUREFRAME, 0x00 );
+ ret |= IS31FL3731_write_register( addr, ISSI_REG_PICTUREFRAME, 0x00 );
// audio sync off
- IS31FL3731_write_register( addr, ISSI_REG_AUDIOSYNC, 0x00 );
+ ret |= IS31FL3731_write_register( addr, ISSI_REG_AUDIOSYNC, 0x00 );
// select bank 0
- IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, 0 );
+ ret |= IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, 0 );
// turn off all LEDs in the LED control register
for ( int i = 0x00; i <= 0x11; i++ )
{
- IS31FL3731_write_register( addr, i, 0x00 );
+ ret |= IS31FL3731_write_register( addr, i, 0x00 );
}
// turn off all LEDs in the blink control register (not really needed)
for ( int i = 0x12; i <= 0x23; i++ )
{
- IS31FL3731_write_register( addr, i, 0x00 );
+ ret |= IS31FL3731_write_register( addr, i, 0x00 );
}
// set PWM on all LEDs to 0
for ( int i = 0x24; i <= 0xB3; i++ )
{
- IS31FL3731_write_register( addr, i, 0x00 );
+ ret |= IS31FL3731_write_register( addr, i, 0x00 );
}
// select "function register" bank
- IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, ISSI_BANK_FUNCTIONREG );
+ ret |= IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, ISSI_BANK_FUNCTIONREG );
// disable software shutdown
- IS31FL3731_write_register( addr, ISSI_REG_SHUTDOWN, 0x01 );
+ ret |= IS31FL3731_write_register( addr, ISSI_REG_SHUTDOWN, 0x01 );
// select bank 0 and leave it selected.
// most usage after initialization is just writing PWM buffers in bank 0
// as there's not much point in double-buffering
- IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, 0 );
+ ret |= IS31FL3731_write_register( addr, ISSI_COMMANDREGISTER, 0 );
+
+ return ret;
}
void IS31FL3731_set_color( int index, uint8_t red, uint8_t green, uint8_t blue )
@@ -223,25 +227,29 @@ void IS31FL3731_set_led_control_register( uint8_t index, bool red, bool green, b
}
-void IS31FL3731_update_pwm_buffers( uint8_t addr1, uint8_t addr2 )
+uint8_t IS31FL3731_update_pwm_buffers( uint8_t addr1, uint8_t addr2 )
{
+ uint8_t ret = 0;
if ( g_pwm_buffer_update_required )
{
- IS31FL3731_write_pwm_buffer( addr1, g_pwm_buffer[0] );
- IS31FL3731_write_pwm_buffer( addr2, g_pwm_buffer[1] );
+ ret |= IS31FL3731_write_pwm_buffer( addr1, g_pwm_buffer[0] );
+ ret |= IS31FL3731_write_pwm_buffer( addr2, g_pwm_buffer[1] );
}
g_pwm_buffer_update_required = false;
+ return ret;
}
-void IS31FL3731_update_led_control_registers( uint8_t addr1, uint8_t addr2 )
+uint8_t IS31FL3731_update_led_control_registers( uint8_t addr1, uint8_t addr2 )
{
+ uint8_t ret = 0;
if ( g_led_control_registers_update_required )
{
for ( int i=0; i<18; i++ )
{
- IS31FL3731_write_register(addr1, i, g_led_control_registers[0][i] );
- IS31FL3731_write_register(addr2, i, g_led_control_registers[1][i] );
+ ret |= IS31FL3731_write_register(addr1, i, g_led_control_registers[0][i] );
+ ret |= IS31FL3731_write_register(addr2, i, g_led_control_registers[1][i] );
}
}
+ return ret;
}
diff --git a/drivers/avr/is31fl3731.h b/drivers/avr/is31fl3731.h
index 3d30fc67b7..62632e276a 100644
--- a/drivers/avr/is31fl3731.h
+++ b/drivers/avr/is31fl3731.h
@@ -31,9 +31,9 @@ typedef struct is31_led {
extern const is31_led g_is31_leds[DRIVER_LED_TOTAL];
-void IS31FL3731_init( uint8_t addr );
-void IS31FL3731_write_register( uint8_t addr, uint8_t reg, uint8_t data );
-void IS31FL3731_write_pwm_buffer( uint8_t addr, uint8_t *pwm_buffer );
+uint8_t IS31FL3731_init( uint8_t addr );
+uint8_t IS31FL3731_write_register( uint8_t addr, uint8_t reg, uint8_t data );
+uint8_t IS31FL3731_write_pwm_buffer( uint8_t addr, uint8_t *pwm_buffer );
void IS31FL3731_set_color( int index, uint8_t red, uint8_t green, uint8_t blue );
void IS31FL3731_set_color_all( uint8_t red, uint8_t green, uint8_t blue );
@@ -44,8 +44,8 @@ void IS31FL3731_set_led_control_register( uint8_t index, bool red, bool green, b
// (eg. from a timer interrupt).
// Call this while idle (in between matrix scans).
// If the buffer is dirty, it will update the driver with the buffer.
-void IS31FL3731_update_pwm_buffers( uint8_t addr1, uint8_t addr2 );
-void IS31FL3731_update_led_control_registers( uint8_t addr1, uint8_t addr2 );
+uint8_t IS31FL3731_update_pwm_buffers( uint8_t addr1, uint8_t addr2 );
+uint8_t IS31FL3731_update_led_control_registers( uint8_t addr1, uint8_t addr2 );
#define C1_1 0x24
#define C1_2 0x25