Hello,
I am trying to set the pwm values directly(i2c) in the following sequence:
-write 16h - 0xFF (D1 is linked to red LED)
- delay x secs
- write 16h - 0x00
- write 17h - 0xFF(D2 is linked to green LED)
But the red (D1) fades out slowly, I want it to switch off immediately and then green to turn on.
Hi Fahad,
I tried in the EVM and I can't dupliatce your board behavior in the EVM, would you refer my sample code and currenr wavaform and try it in your board?
Thanks!
Summer
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/*******************************************************************************
* MSP432 I2C - EUSCI_B0_BASE I2C Master TX multiple bytes to MSP432 Slave
*
* Description: This demo connects two MSP432 's via the I2C bus. The master
* transmits to the slave. This is the MASTER CODE. It continuously
* transmits an array of data and demonstrates how to implement an I2C
* master transmitter sending multiple bytes using the USCI_B0 TX interrupt.
* ACLK = n/a, MCLK = HSMCLK = SMCLK = BRCLK = default DCO = ~3.0MHz
*
* /|\ /|\
* MSP432P401 10k 10k MSP432P401
* slave | | master
* ----------------- | | -----------------
* | P1.6/UCB0SDA|<-|----+->|P1.6/UCB0SDA |
* | | | | |
* | | | | |
* | P1.7/UCB0SCL|<-+------>|P1.7/UCB0SCL |
* | | | |
*
******************************************************************************/
/* DriverLib Includes */
#include <ti/devices/msp432p4xx/driverlib/driverlib.h>
/* Standard Includes */
#include <stdint.h>
#include <stdbool.h>
/* Slave Address for I2C Slave */
#define SLAVE_ADDRESS1 0x40
#define SLAVE_ADDRESS2 0x33
#define SLAVE_ADDRESS3 0x34
#define SLAVE_ADDRESS4 0x35
/* TIDA-00757 Board specific LEDs */
#define TIDA00757_D1 1
#define TIDA00757_D2 2
#define TIDA00757_D3 3
#define TIDA00757_D4 4
#define TIDA00757_D5 5
#define TIDA00757_D6 6
#define TIDA00757_ALL 7
/* Colors */
#define COLOR_OFF 0
#define COLOR_BLUE 1
#define COLOR_GREEN 2
#define COLOR_SKYBLUE 3
#define COLOR_RED 4
#define COLOR_PURPLE 5
#define COLOR_YELLOW 6
#define COLOR_WHITE 7
/* Address */
#define LP55231_DEVICE1_ADDR 0x32
#define LP55231_DEVICE2_ADDR 0x33
/* Registers */
#define LP55231_REG_ENABLE 0x00
#define LP55231_REG_OUTPUT_CTRL_MSB 0x04
#define LP55231_REG_OUTPUT_CTRL_LSB 0x05
#define LP55231_REG_D1_CTRL 0x06
#define LP55231_REG_D2_CTRL 0x07
#define LP55231_REG_D3_CTRL 0x08
#define LP55231_REG_D4_CTRL 0x09
#define LP55231_REG_D5_CTRL 0x0A
#define LP55231_REG_D6_CTRL 0x0B
#define LP55231_REG_D7_CTRL 0x0C
#define LP55231_REG_D8_CTRL 0x0D
#define LP55231_REG_D9_CTRL 0x0E
#define LP55231_REG_D1_PWM 0x16
#define LP55231_REG_D2_PWM 0x17
#define LP55231_REG_D3_PWM 0x18
#define LP55231_REG_D4_PWM 0x19
#define LP55231_REG_D5_PWM 0x1A
#define LP55231_REG_D6_PWM 0x1B
#define LP55231_REG_D7_PWM 0x1C
#define LP55231_REG_D8_PWM 0x1D
#define LP55231_REG_D9_PWM 0x1E
#define LP55231_REG_D1_CURRENT_CTRL 0x26
#define LP55231_REG_D2_CURRENT_CTRL 0x27
#define LP55231_REG_D3_CURRENT_CTRL 0x28
#define LP55231_REG_D4_CURRENT_CTRL 0x29
#define LP55231_REG_D5_CURRENT_CTRL 0x2A
#define LP55231_REG_D6_CURRENT_CTRL 0x2B
#define LP55231_REG_D7_CURRENT_CTRL 0x2C
#define LP55231_REG_D8_CURRENT_CTRL 0x2D
#define LP55231_REG_D9_CURRENT_CTRL 0x2E
#define LP55231_REG_MISC 0x36
#define LP55231_REG_STATUS 0x3A
#define LP55231_REG_RESET 0x3D
#define LP55231_REG_MASTER_FADER1 0x48
#define LP55231_REG_MASTER_FADER2 0x49
#define LP55231_REG_MASTER_FADER3 0x4A
/* Bit description in registers */
#define LP55231_ENABLE 0x40
#define LP55231_DISABLE 0x00
#define LP55231_PWR_SAVE 0x20
#define LP55231_PWM_PWR_SAVE 0x04
#define LP55231_CP_AUTO 0x18
#define LP55231_CP_1x 0x08
#define LP55231_AUTO_CLK 0x02
#define LP55231_RESET 0xFF
#define LP55231_FADER_MAPPING_MASK 0xC0
#define LP55231_FADER_MAPPING_SHIFT 6
/*****************************************************************************
* GLOBAL FUNCTIONS
*/
/* Statics */
const eUSCI_I2C_MasterConfig i2cConfig =
{
EUSCI_B_I2C_CLOCKSOURCE_SMCLK, // SMCLK Clock Source
3000000, // SMCLK = 3MHz
EUSCI_B_I2C_SET_DATA_RATE_400KBPS, // Desired I2C Clock of 400khz
0, // No byte counter threshold
EUSCI_B_I2C_NO_AUTO_STOP // No Autostop
};
unsigned char exp[]={0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08};
unsigned char current[]={0x50,0x50,0x50,0x50,0x50,0x50,0x50,0x50,0x50};
unsigned char pwm[]={0xef,0xef,0xef,0xef,0xef,0xef,0xef,0xef,0xef};
unsigned char pwm_0[]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
void SendData_1(unsigned char Chip_ADD,unsigned char *pwm,unsigned char *exp,unsigned char *current)// unsigned char *pwm,unsigned char *exp,unsigned char *currenty
{ int i;
MAP_I2C_setSlaveAddress(EUSCI_B1_BASE, Chip_ADD);
MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, 0x00); //send register address
MAP_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE,0x00); // send register data
__delay_cycles(50000); //6/25M=240ns
MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, 0x00); //send register address
MAP_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE,0x40); // send register data
MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, 0x2f); //send register address
MAP_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE,0x48); // send register data
MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, 0x07); //send register address
for(i=0;i<9;i++)
{MAP_I2C_masterSendMultiByteNext(EUSCI_B1_BASE,exp[i]);} // send register data
// MAP_I2C_masterSendMultiByteStop(EUSCI_B1_BASE);
MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, 0x22); //send register address
for(i=0;i<9;i++)
{MAP_I2C_masterSendMultiByteNext(EUSCI_B1_BASE,current[i]);} // send register data
// MAP_I2C_masterSendMultiByteStop(EUSCI_B1_BASE);
MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, 0x16); //send register address
for(i=0;i<9;i++)
{MAP_I2C_masterSendMultiByteNext(EUSCI_B1_BASE,pwm[i]);} // send register data
// MAP_I2C_masterSendMultiByteStop(EUSCI_B1_BASE);
}
void SendData_2(unsigned char Chip_ADD,unsigned char *current)// unsigned char *pwm,unsigned char *exp,unsigned char *currenty
{ int i,j;
MAP_I2C_setSlaveAddress(EUSCI_B1_BASE, Chip_ADD);
MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, LP55231_REG_RESET); //send register address
MAP_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE,LP55231_RESET); // send register data
__delay_cycles(50000); //6/25M=240ns
MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, LP55231_REG_MISC); //send register address
MAP_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE,LP55231_CP_1x | LP55231_AUTO_CLK | LP55231_PWR_SAVE); // send register data
//MAP_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE,0x28); // send register data
MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, LP55231_REG_OUTPUT_CTRL_MSB); //send register address
MAP_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE,0x01); // send register data
MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, LP55231_REG_OUTPUT_CTRL_LSB); //send register address
MAP_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE,0xFF); // send register data
MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, LP55231_REG_ENABLE); //send register address
MAP_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE,LP55231_ENABLE); // send register data
__delay_cycles(50000); //6/25M=240ns
MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, 0x22); //send register address
for(i=0;i<9;i++)
{MAP_I2C_masterSendMultiByteNext(EUSCI_B1_BASE,current[i]);} // send register data
// MAP_I2C_masterSendMultiByteStop(EUSCI_B1_BASE);
//MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, 0x16); //send register address
//MAP_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE,0xff); // send register data
//MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, 0x17); //send register address
//MAP_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE,0xff); // send register data
//MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, 0x18); //send register address
//MAP_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE,0xff); // send register data
//MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, 0x19); //send register address
//MAP_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE,0xff); // send register data
//MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, 0x1A); //send register address
//MAP_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE,0xff); // send register data
//MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, 0x1B); //send register address
//MAP_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE,0xff); // send register data
MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, 0x1c); //send register address
MAP_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE,0xff); // send register data
MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, 0x1d); //send register address
MAP_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE,0xff); // send register data
MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, 0x1f); //send register address
MAP_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE,0xff); // send register data
for(j=0;j<10000;j++)
{ __delay_cycles(15000); //25M=240ns
//MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, LP55231_REG_RESET); //send register address
//MAP_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE,LP55231_RESET); // send register data
MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, 0x16); //send register address
MAP_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE,0xff); // send register data
MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, 0x1d); //send register address
MAP_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE,0x00); // send register data
__delay_cycles(15000); //25M=240ns
//MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, LP55231_REG_RESET); //send register address
//MAP_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE,LP55231_RESET); // send register data
MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, 0x16); //send register address
MAP_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE,0x00); // send register data
MAP_I2C_masterSendMultiByteStart(EUSCI_B1_BASE, 0x1d); //send register address
MAP_I2C_masterSendMultiByteFinish(EUSCI_B1_BASE,0xff); // send register data
}
// MAP_I2C_masterSendMultiByteStop(EUSCI_B1_BASE);
}
//![Simple I2C Config]
/* I2C Master Configuration Parameter */
//![Simple I2C Config]
int main(void)
{
volatile uint32_t ii;
int size;
/* Disabling the Watchdog */
MAP_WDT_A_holdTimer();
MAP_CS_initClockSignal(CS_ACLK,CS_LFXTCLK_SELECT, CS_CLOCK_DIVIDER_1);
GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_P4,GPIO_PIN2,GPIO_PRIMARY_MODULE_FUNCTION);
/* Select Port 6 for I2C - Set Pin 4, 5 to input Primary Module Function,
* (UCB1SIMO/UCB1SDA, UCB1SOMI/UCB1SCL). */
MAP_GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P6,
GPIO_PIN5|GPIO_PIN4, GPIO_PRIMARY_MODULE_FUNCTION);
GPIO_setAsOutputPin(GPIO_PORT_P5, GPIO_PIN6);
//![Simple I2C Example]
/* Initializing I2C Master to SMCLK at 400kbs with no autostop */
MAP_I2C_initMaster(EUSCI_B1_BASE, &i2cConfig);
/* Set Master in transmit mode */
MAP_I2C_setMode(EUSCI_B1_BASE, EUSCI_B_I2C_TRANSMIT_MODE);
/* Enable I2C Module to start operations */
MAP_I2C_enableModule(EUSCI_B1_BASE);
GPIO_setOutputLowOnPin(GPIO_PORT_P5, GPIO_PIN6); //PWM PIN
__delay_cycles(6); //6/25M=240ns
GPIO_setOutputHighOnPin(GPIO_PORT_P5, GPIO_PIN6);
//size=sizeof(table)/sizeof(table[0]);
//size=size/2;
SendData_2(0x32,current);
//load_SRAM(0x40);
// SendData(0x40,table,size);
while (1)
{
/* Delay between Transmissions */
// for (ii = 0; ii < 4000; ii++);
/* Making sure the last transaction has been completely sent out */
while (MAP_I2C_masterIsStopSent(EUSCI_B1_BASE) == EUSCI_B_I2C_SENDING_STOP);
}
}
/*******************************************************************************
* The USCIAB0TX_ISR is structured such that it can be used to transmit any
* number of bytes by pre-loading TXByteCtr with the byte count. Also, TXData
* points to the next byte to transmit.
******************************************************************************/
void EUSCIB2_IRQHandler(void)
{
uint_fast16_t status;
status = MAP_I2C_getEnabledInterruptStatus(EUSCI_B1_BASE);
MAP_I2C_clearInterruptFlag(EUSCI_B1_BASE, status);
if (status & EUSCI_B_I2C_NAK_INTERRUPT)
{
MAP_I2C_masterSendStart(EUSCI_B1_BASE);
}
//if (status & EUSCI_B_I2C_TRANSMIT_INTERRUPT0)
//{
// }
}