TWI nrf_frv_twi_tx without response

Question

nrf52832 softdevice S132 SDK15 custom board 
 TWI instance 
 TX(nrf_drv_twi_tx) failed, slave device is AD5252 digital potentiometer, i want to send data to the potentiometer, it works when i combine gpiote and twi, it is a simple example. 
 but i combine twi with ble_app_uart and saadc,it doesn't work. 
 in sdk_config.h i enable NRFX_TWI_ENABLED and TWI_ENABLED, i use twi0 instance without easyDMA. 
 i also enable UART \ UARTE \GPIOTE \SAADC (triggered by PPI+timer) for other modules. 
 i can't get any twi error when i debug, SDA and SCL have already been pulled up. 
 twi register shows: 
 
 the STARTTX task is not triggered, and what event can trigger this task? 
 i doubt if the PPI channel twi use collides with other event/task ? 
 Any reply will be appreciated!!!

1730143 · Accepted Answer

thanks for your reply! i don't think the problem is caused by the slave device,in my first example, it works well without softdevice my first example: //main.c #define WP 11 void RDAC_init(void); void twi0_init (void); int main(void) { nrf_gpio_cfg_output(WP); nrf_gpio_pin_set(WP); twi0_init(); RDAC_init(); LED_Init(); EXIT_KEY_Init(); while(1) { } } //TWI #define TWI_INSTANCE_ID0 0 static const nrf_drv_twi_t m_twi0 = NRF_DRV_TWI_INSTANCE(TWI_INSTANCE_ID0); /**@brief TWI initialization. */ void twi0_init (void) { const nrf_drv_twi_config_t twi0_ADA5252_config = { .scl = 25,//25 .sda = 27,//27 .frequency = NRF_DRV_TWI_FREQ_100K, .interrupt_priority = 2, .clear_bus_init = false }; nrf_drv_twi_init(&m_twi0, &twi0_ADA5252_config, NULL, NULL); nrf_drv_twi_enable(&m_twi0); } uint8_t salve_addr = 0x2C; void RDAC_init() { uint8_t reg1[2]; reg1[0]=0x01; reg1[1]=0x80; uint8_t reg2[2]; reg2[0]=0x03; reg2[1]=0x80; nrf_drv_twi_tx(&m_twi0, salve_addr, reg1, sizeof(reg1), false); nrf_drv_twi_tx(&m_twi0, salve_addr, reg2, sizeof(reg2), false); } void RDAC1_INC(int i) { uint8_t reg[2]; reg[0]=0x01; reg[1]=i; nrf_drv_twi_tx(&m_twi0, salve_addr, reg, sizeof(reg), false); } void RDAC1_DEC(int i) { uint8_t reg[2]; reg[0]=0x01; reg[1]=i; nrf_drv_twi_tx(&m_twi0, salve_addr, reg, sizeof(reg), false); } void RDAC3_INC(int j) { uint8_t reg[2]; reg[0]=0x03; reg[1]=j; nrf_drv_twi_tx(&m_twi0, salve_addr, reg, sizeof(reg), false); } void RDAC3_DEC(int j) { uint8_t reg[2]; reg[0]=0x03; reg[1]=j; nrf_drv_twi_tx(&m_twi0, salve_addr, reg, sizeof(reg), false); } //GPIOTE void EXIT_KEY_Init(void) { nrf_gpio_pin_set(13); nrf_gpio_pin_set(14); nrf_gpio_pin_set(15); nrf_gpio_pin_set(16); nrf_gpio_cfg_input(KEY_0,NRF_GPIO_PIN_PULLUP); nrf_gpio_cfg_input(KEY_1,NRF_GPIO_PIN_PULLUP); nrf_gpio_cfg_input(KEY_2,NRF_GPIO_PIN_PULLUP); nrf_gpio_cfg_input(KEY_3,NRF_GPIO_PIN_PULLUP); NVIC_EnableIRQ(GPIOTE_IRQn); NRF_GPIOTE->CONFIG[0] = (GPIOTE_CONFIG_POLARITY_HiToLo << GPIOTE_CONFIG_POLARITY_Pos) | (13 << GPIOTE_CONFIG_PSEL_Pos) | (GPIOTE_CONFIG_MODE_Event << GPIOTE_CONFIG_MODE_Pos); NRF_GPIOTE->INTENSET = GPIOTE_INTENSET_IN0_Set << GPIOTE_INTENSET_IN0_Pos; NRF_GPIOTE->CONFIG[1] = (GPIOTE_CONFIG_POLARITY_HiToLo << GPIOTE_CONFIG_POLARITY_Pos) | (14<< GPIOTE_CONFIG_PSEL_Pos) | (GPIOTE_CONFIG_MODE_Event << GPIOTE_CONFIG_MODE_Pos); NRF_GPIOTE->INTENSET = GPIOTE_INTENSET_IN1_Set << GPIOTE_INTENSET_IN1_Pos; NRF_GPIOTE->CONFIG[2] = (GPIOTE_CONFIG_POLARITY_HiToLo << GPIOTE_CONFIG_POLARITY_Pos) | (15 << GPIOTE_CONFIG_PSEL_Pos) | (GPIOTE_CONFIG_MODE_Event << GPIOTE_CONFIG_MODE_Pos); NRF_GPIOTE->INTENSET = GPIOTE_INTENSET_IN2_Set << GPIOTE_INTENSET_IN2_Pos; NRF_GPIOTE->CONFIG[3] = (GPIOTE_CONFIG_POLARITY_HiToLo << GPIOTE_CONFIG_POLARITY_Pos) | (16<< GPIOTE_CONFIG_PSEL_Pos) | (GPIOTE_CONFIG_MODE_Event << GPIOTE_CONFIG_MODE_Pos); NRF_GPIOTE->INTENSET = GPIOTE_INTENSET_IN3_Set << GPIOTE_INTENSET_IN3_Pos; } int i=128,j=128,k=0; void GPIOTE_IRQHandler(void) { if(nrf_gpio_pin_read(KEY_0)== 0) { if ((NRF_GPIOTE->EVENTS_IN[0] == 1) && (NRF_GPIOTE->INTENSET & GPIOTE_INTENSET_IN0_Msk)) { NRF_GPIOTE->EVENTS_IN[0] = 0; LED1_Toggle(); i++; k=i<=256?i:256; if(k==0) {i=k;} RDAC3_INC(k); } } if(nrf_gpio_pin_read(KEY_1)== 0) { if ((NRF_GPIOTE->EVENTS_IN[1] == 1) && (NRF_GPIOTE->INTENSET & GPIOTE_INTENSET_IN1_Msk)) { NRF_GPIOTE->EVENTS_IN[1] = 0; LED2_Toggle(); i--; k=i>=0?i:0; if(k==0) {i=k;} RDAC3_DEC(k); } } if(nrf_gpio_pin_read(KEY_2)== 0) { if ((NRF_GPIOTE->EVENTS_IN[2] == 1) && (NRF_GPIOTE->INTENSET & GPIOTE_INTENSET_IN0_Msk)) { NRF_GPIOTE->EVENTS_IN[2] = 0; LED3_Toggle(); j++; k=j<=256?j:256; if(k==0) {j=k;} RDAC1_INC(k); } } if(nrf_gpio_pin_read(KEY_3)== 0) { if ((NRF_GPIOTE->EVENTS_IN[3] == 1) && (NRF_GPIOTE->INTENSET & GPIOTE_INTENSET_IN1_Msk)) { NRF_GPIOTE->EVENTS_IN[3] = 0; LED4_Toggle(); j--; k=j>=0?j:0; if(k==0) {j=k;} RDAC1_DEC(k); } } } codes about TWI are same in two example including twi_init, salve address, SCL,SDA...... but in my second example, i use ble_app_uart, add a nus service, saadc.....and softdevice this is my whole project: it seems like that the master send two bytes out but the slave doesn't get them, or the master doesn't send bytes successfully at all. I am totally confused, could you please give me some suggestions? As for pins 9 and 10, i got it. Thanks!

TWI nrf_frv_twi_tx without response

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