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adds timeout to avr i2c

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This commit is contained in:
Jack Humbert 2018-06-12 23:37:06 -04:00
parent b8564f5dd0
commit bad56a4f2b
8 changed files with 163 additions and 80 deletions
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71
drivers/avr/i2c_master.c
View file

@ -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);
#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);
#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)) );
#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);
#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);
#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;
}

2
drivers/avr/i2c_master.h
View file

@ -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

56
drivers/avr/is31fl3731.c
View file

@ -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;
}

10
drivers/avr/is31fl3731.h
View file

@ -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

2
keyboards/ergodox_ez/config.h
View file

@ -138,4 +138,6 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
//#define NO_ACTION_FUNCTION
//#define DEBUG_MATRIX_SCAN_RATE
#define I2C_TIMEOUT 1000
#endif

2
quantum/quantum.c
View file

@ -854,7 +854,7 @@ void matrix_init_quantum() {
audio_init();
#endif
#ifdef RGB_MATRIX_ENABLE
rgb_matrix_init_drivers();
rgb_matrix_init();
#endif
matrix_init_kb();
}

41
quantum/rgb_matrix.c
View file

@ -101,10 +101,14 @@ void map_row_column_to_led( uint8_t row, uint8_t column, uint8_t *led_i, uint8_t
}
}
void rgb_matrix_update_pwm_buffers(void) {
IS31FL3731_update_pwm_buffers( DRIVER_ADDR_1, DRIVER_ADDR_2 );
IS31FL3731_update_led_control_registers( DRIVER_ADDR_1, DRIVER_ADDR_2 );
uint8_t ret = IS31FL3731_update_pwm_buffers( DRIVER_ADDR_1, DRIVER_ADDR_2 );
ret |= IS31FL3731_update_led_control_registers( DRIVER_ADDR_1, DRIVER_ADDR_2 );
if (ret == 2) {
wait_ms(1000);
i2c_stop();
rgb_matrix_setup_drivers();
}
}
void rgb_matrix_set_color( int index, uint8_t red, uint8_t green, uint8_t blue ) {
@ -115,7 +119,6 @@ void rgb_matrix_set_color_all( uint8_t red, uint8_t green, uint8_t blue ) {
IS31FL3731_set_color_all( red, green, blue );
}
bool process_rgb_matrix(uint16_t keycode, keyrecord_t *record) {
if ( record->event.pressed ) {
uint8_t led[8], led_count;
@ -722,19 +725,8 @@ void rgb_matrix_indicators_user(void) {}
// }
// }
void rgb_matrix_init_drivers(void) {
// Initialize TWI
i2c_init();
IS31FL3731_init( DRIVER_ADDR_1 );
IS31FL3731_init( DRIVER_ADDR_2 );
for ( int index = 0; index < DRIVER_LED_TOTAL; index++ ) {
bool enabled = true;
// This only caches it for later
IS31FL3731_set_led_control_register( index, enabled, enabled, enabled );
}
// This actually updates the LED drivers
IS31FL3731_update_led_control_registers( DRIVER_ADDR_1, DRIVER_ADDR_2 );
void rgb_matrix_init(void) {
rgb_matrix_setup_drivers();
// TODO: put the 1 second startup delay here?
@ -758,6 +750,21 @@ void rgb_matrix_init_drivers(void) {
eeconfig_debug_rgb_matrix(); // display current eeprom values
}
void rgb_matrix_setup_drivers(void) {
// Initialize TWI
i2c_init();
IS31FL3731_init( DRIVER_ADDR_1 );
IS31FL3731_init( DRIVER_ADDR_2 );
for ( int index = 0; index < DRIVER_LED_TOTAL; index++ ) {
bool enabled = true;
// This only caches it for later
IS31FL3731_set_led_control_register( index, enabled, enabled, enabled );
}
// This actually updates the LED drivers
IS31FL3731_update_led_control_registers( DRIVER_ADDR_1, DRIVER_ADDR_2 );
}
// Deals with the messy details of incrementing an integer
uint8_t increment( uint8_t value, uint8_t step, uint8_t min, uint8_t max ) {
int16_t new_value = value;

3
quantum/rgb_matrix.h
View file

@ -95,7 +95,8 @@ void rgb_matrix_indicators_user(void);
void rgb_matrix_single_LED_test(void);
void rgb_matrix_init_drivers(void);
void rgb_matrix_init(void);
void rgb_matrix_setup_drivers(void);
void rgb_matrix_set_suspend_state(bool state);
void rgb_matrix_set_indicator_state(uint8_t state);