Hi,
I am using an LP5562 LED driver in my device. Now I am facing two issues when I try to Load the LED pattern into the SRAM of LP5562.
1) Sometimes Writing to Engine #1(10H) fails((1 out of 10 times)
2) Sometimes All I2C operations are successful but the pattern is not as expected(1 out of 25 times). I have added a workaround here that Writing to Enginee #1 fails to try again.
I am attaching my code snippet for the same let me know if I am doing something unexpected with I2C operations.
// @brief LP5562 Register Map
typedef enum
{
LP5562_REG_ENABLE = 0x00,
LP5562_REG_OP_MODE = 0x01,
LP5562_REG_B_PWM = 0x02,
LP5562_REG_G_PWM = 0x03,
LP5562_REG_R_PWM = 0x04,
LP5562_REG_B_CURRENT = 0x05,
LP5562_REG_G_CURRENT = 0x06,
LP5562_REG_R_CURRENT = 0x07,
LP5562_REG_CONFIG = 0x08,
LP5562_ENG1_PC = 0x09,
LP5562_ENG2_PC = 0x0A,
LP5562_ENG3_PC = 0x0B,
LP5562_STATUS_INT = 0x0C, // Read Only
LP5562_REG_RESET = 0x0D,
LP5562_REG_W_PWM = 0x0E,
LP5562_REG_W_CURRENT = 0x0F,
LP5562_REG_ENG_SEL = 0x70,
LP5562_REG_PROG_MEM_ENG1 = 0x10,
LP5562_REG_PROG_MEM_ENG2 = 0x30,
LP5562_REG_PROG_MEM_ENG3 = 0x50,
} lp5562_register_t;
//
// LED LP5562 Defines
//
#define LED_LP5562_ENGINE_RAM_SIZE (16)
#define LED_LP5562_CURRENT_ARRAY_SIZE (3)
// Enable Register Configurations
#define LP5562_MASTER_ENABLE ( 0x40 ) // Chip master enable
#define LP5562_LOGARITHMIC_PWM ( 0x80 )
#define LP5562_EXEC_RUN ( 0x2A )
#define LP5562_ENABLE_RUN_PROGRAM ( 0x6A )
#define LP5562_ENABLE_DEFAULT ( LP5562_MASTER_ENABLE | LP5562_LOGARITHMIC_PWM )
#define LP5562_RESET_ENABLE ( 0x00 )
// Opmode Register
#define LP5562_MODE_ENG1_M ( 0x30 )
#define LP5562_MODE_ENG2_M ( 0x0C )
#define LP5562_MODE_ENG3_M ( 0x03 )
#define LP5562_LOAD_ENG1 ( 0x10 )
#define LP5562_LOAD_ENG2 ( 0x04 )
#define LP5562_LOAD_ENG3 ( 0x01 )
#define LP5562_RUN_ENG1 ( 0x20 )
#define LP5562_RUN_ENG2 ( 0x08 )
#define LP5562_RUN_ENG3 ( 0x02 )
#define LP5562_ENG_SET_LOAD ( 0x15 )
#define LP5562_ENG_SET_DISABLE ( 0x00 )
#define LP5562_ENG_SET_RUN ( 0x2A )
#define LP5562_ENG_SET_DIRECT ( 0xFF )
typedef struct __attribute__((__packed__))
{
uint8_t bEngine1LED;
uint16_t awEngine1[ LED_LP5562_ENGINE_RAM_SIZE ];
uint8_t bEngine2LED;
uint16_t awEngine2[ LED_LP5562_ENGINE_RAM_SIZE ];
uint8_t bEngine3LED;
uint16_t awEngine3[ LED_LP5562_ENGINE_RAM_SIZE ];
uint8_t abCurrentControl[ LED_LP5562_CURRENT_ARRAY_SIZE ];
} tLEDPattern;
//Enable LP5562 LED Driver chip.
ulRegValue = LP5562_MASTER_ENABLE ;
tI2CStatus = tHAL_I2CM_WriteRegister( I2CM_LP5562_LED_DRIVER , LP5562_REG_ENABLE , (uint8_t *)&ulRegValue , NU_I2C_SINGLE_BYTE );
NU_BREAK_ON_FAILURE( tI2CStatus );
// Put 600us Delay.
vNU_DelayInUs( DELAY_600_US );
//Use Internal Clock.
ulRegValue = APP_LP5562_CFG_REG_VALUE ;
tI2CStatus = tHAL_I2CM_WriteRegister( I2CM_LP5562_LED_DRIVER , LP5562_REG_CONFIG , (uint8_t *)&ulRegValue , NU_I2C_SINGLE_BYTE );
NU_BREAK_ON_FAILURE( tI2CStatus );
//Map ENG1-R ENG2-G ENG3-B I2C-W
ulRegValue = ulAPP_GetLEDMapping ( ptLEDPacket, &ulRegOpModeVal, &ulRegEnableVal ) ;
tI2CStatus = tHAL_I2CM_WriteRegister( I2CM_LP5562_LED_DRIVER , LP5562_REG_ENG_SEL , (uint8_t *)&ulRegValue , NU_I2C_SINGLE_BYTE );
NU_BREAK_ON_FAILURE( tI2CStatus );
//Configure ENG1,ENG2,ENG3 into 'Load program to SRAM' mode.
ulRegValue = LP5562_ENG_SET_LOAD;
tI2CStatus = tHAL_I2CM_WriteRegister( I2CM_LP5562_LED_DRIVER , LP5562_REG_OP_MODE , (uint8_t *)&ulRegValue , NU_I2C_SINGLE_BYTE );
NU_BREAK_ON_FAILURE( tI2CStatus );
if( ptLEDPacket -> bEngine1LED )
{
//Load program to ENG1 SRAM(10H).
tI2CStatus = tHAL_I2CM_WriteRegister( I2CM_LP5562_LED_DRIVER , LP5562_REG_PROG_MEM_ENG1 , (uint8_t *)ptLEDPacket->awEngine1 , LP5562_PATTERN_SIZE );
NU_BREAK_ON_FAILURE( tI2CStatus );
}
tError = eLayer2Error;
if( ptLEDPacket -> bEngine2LED )
{
//Load program to ENG2 SRAM(30H).
tI2CStatus = tHAL_I2CM_WriteRegister( I2CM_LP5562_LED_DRIVER , LP5562_REG_PROG_MEM_ENG2 , (uint8_t *)ptLEDPacket->awEngine2 , LP5562_PATTERN_SIZE );
NU_BREAK_ON_FAILURE( tI2CStatus );
}
tError = eLayer3Error;
if( ptLEDPacket -> bEngine3LED )
{
//Load program to ENG3 SRAM(50H).
tI2CStatus = tHAL_I2CM_WriteRegister( I2CM_LP5562_LED_DRIVER , LP5562_REG_PROG_MEM_ENG3 , (uint8_t *)ptLEDPacket->awEngine3 , LP5562_PATTERN_SIZE );
NU_BREAK_ON_FAILURE( tI2CStatus );
}
tError = eCurrentArrayError;
//set Current Values
tI2CStatus = tHAL_I2CM_WriteRegister( I2CM_LP5562_LED_DRIVER , LP5562_REG_B_CURRENT , ptLEDPacket->abCurrentControl, LP5562_NUM_LEDS );
NU_BREAK_ON_FAILURE( tI2CStatus );
//Disable all Engines.
ulRegValue = DISABLE_ALL_ENG;
tI2CStatus = tHAL_I2CM_WriteRegister( I2CM_LP5562_LED_DRIVER , LP5562_REG_OP_MODE , (uint8_t *)&ulRegValue , NU_I2C_SINGLE_BYTE );
NU_BREAK_ON_FAILURE( tI2CStatus );
//Run Program .
tI2CStatus = tHAL_I2CM_WriteRegister( I2CM_LP5562_LED_DRIVER , LP5562_REG_OP_MODE , (uint8_t *)&ulRegOpModeVal , NU_I2C_SINGLE_BYTE );
NU_BREAK_ON_FAILURE( tI2CStatus );
//Chip enable & Run all ENG.
tI2CStatus = tHAL_I2CM_WriteRegister( I2CM_LP5562_LED_DRIVER , LP5562_REG_ENABLE , (uint8_t *)&ulRegEnableVal , NU_I2C_SINGLE_BYTE );
NU_BREAK_ON_FAILURE( tI2CStatus );
tError = eNoError;
// Put 600us Delay.
vNU_DelayInUs( DELAY_600_US );
