TDA4VM: 關於 Main Domain MCAN設定 IO expander 卡住?!

EVM: J721EXCP01EVM

SDK: ti-processor-sdk-rtos-j721e-evm-08_06_01_03

Refer: mcan_evm_loopback_app_main_k3.c

在 J721EXCP01EVM 打算使用

(MCU1_0) MCU MCAN0 – J30 (J29)

(MCU2_1) Main MCAN0 – J27 (J24)

目前設定Main MCAN0時候，IO Expander (TCA6424) 都會發生卡在下列設定。 

當使用 I2C_transfer() 無法 return value到 status，程序 hang 在這邊。

想請問是設定TCA6424 時候，周邊沒有搭配好嗎? 或是發生問題!? 謝謝。

void padConfig_prcmEnable()
{/* UART Init */Board_initCfgboardCfg;Board_STATUSboardStatus;I2C_Paramsi2cParams;I2C_Handlehandle = NULL;uint8_tdataToSlave[4];boardCfg = BOARD_INIT_MODULE_CLOCK |BOARD_INIT_PINMUX_CONFIG;boardStatus = Board_init(boardCfg);if (boardStatus != BOARD_SOK){App_ConsolePrintf("[Error] Board init failed!!\n");}#if 0 // No use GESI board./* Pin mux for CAN STB used in GESI board */*(volatile unsigned int *)(0x0011c0f4) = 0x20007;/* Pinmux for MAIN_MCAN4 */*(volatile unsigned int *)(0x0011c020) = 0x60006;*(volatile unsigned int *)(0x0011c024) = 0x60006;/* Pinmux for MAIN_MCAN5 */*(volatile unsigned int *)(0x0011c04c) = 0x60006;*(volatile unsigned int *)(0x0011c050) = 0x60006;/* Pinmux for MAIN_MCAN6 */*(volatile unsigned int *)(0x0011c054) = 0x60006;*(volatile unsigned int *)(0x0011c06C) = 0x60006;/* Pinmux for MAIN_MCAN7 */*(volatile unsigned int *)(0x0011c074) = 0x60006;*(volatile unsigned int *)(0x0011c078) = 0x60006;/* Pinmux for MAIN_MCAN9 */*(volatile unsigned int *)(0x0011c0cc) = 0x60006;*(volatile unsigned int *)(0x0011c0d0) = 0x60006;/* Pinmux for MAIN_MCAN11 */*(volatile unsigned int *)(0x0011c11c) = 0x60006;*(volatile unsigned int *)(0x0011c120) = 0x60006;#endif/*J721EXCPEVM- MCU MCAN0  – J30 (J29)- MCU MCAN1  – J31- Main MCAN0 – J27 (J24)- Main MCAN2 – J28 (J25)*/#if 0/* GPIO initialization */GPIO_init();/* Enable CAN transceivers by setting the STB pins *//* Enable the TCAN on GESI board.* Main Domain MCAN instances 4,5,6,7,9,11.*/GPIO_write(0, GPIO_PIN_LOW);/* Set MCU_MCAN1_STB to LEVEL_LOW to exit CAN1 from Standby mode */GPIOSetDirMode_v0(CSL_WKUP_GPIO0_BASE, MCU_MCAN1_STB_PIN, GPIO_DIRECTION_OUTPUT);GPIOPinWrite_v0(CSL_WKUP_GPIO0_BASE, MCU_MCAN1_STB_PIN, GPIO_PIN_LOW);/* Set MCU_MCAN0_EN Enable to LEVEL_HIGH to Enable MCU MCAN 0*/GPIOSetDirMode_v0(CSL_WKUP_GPIO0_BASE, MCU_MCAN0_ENABLE_PIN, GPIO_DIRECTION_OUTPUT);GPIOPinWrite_v0(CSL_WKUP_GPIO0_BASE, MCU_MCAN0_ENABLE_PIN, GPIO_PIN_HIGH);/* Set MCU_MCAN0_STBz pin to LEVEL_High to exit CAN0 from Standby mode */GPIOSetDirMode_v0(CSL_WKUP_GPIO0_BASE, MCU_MCAN0_STBZ_PIN, GPIO_DIRECTION_OUTPUT);GPIOPinWrite_v0(CSL_WKUP_GPIO0_BASE, MCU_MCAN0_STBZ_PIN, GPIO_PIN_HIGH);/* Enable Main MCAN 2, GPIO0_127. */GPIO_write(1, GPIO_PIN_LOW);#endif/** Configuring TCA6424 IO Exp 2 with addr 0x22* This io expander is controlled by i2c0* For Main MCAN2 P13 and P14 should be set to 0, This should route the MCAN2 STB line to transciver.* For Main MCAN0 P06 and P07 should be set to 1.*//* I2C initialization */I2C_init();I2C_Params_init(&i2cParams);i2cParams.transferMode = I2C_MODE_BLOCKING;i2cParams.bitRate = I2C_400kHz;i2cParams.transferCallbackFxn = NULL;handle = I2C_open(0U, &i2cParams);dataToSlave[0] = TCA6424_REG_CONFIG0 | TCA6424_CMD_AUTO_INC; // 0x0CU | 0x80UdataToSlave[1] = 0x0U;SetupI2CTransfer(handle, 0x22, &dataToSlave[0], 2, NULL, 0);dataToSlave[0] = TCA6424_REG_INPUT0 | TCA6424_CMD_AUTO_INC; // 0x00U | 0x80UdataToSlave[1] = 0x0U;dataToSlave[2] = 0x0U;dataToSlave[3] = 0x0U;SetupI2CTransfer(handle, 0x22, &dataToSlave[0], 1, &dataToSlave[1], 3);/* Set P06 and P07 to 1.P06: MCAN0_EN, MCAN0 PHY Enable, Active High ('0' - device disabled, '1' normal operation)P07: MCAN0_STB#, MCAN0 PHY Standby, Active Low ('0' - device standby, '1' - normal operation)* Set P13 and P14 to 0.P13: MLB_MUX_SEL, Signal Mux Control ('0' - MCAN2/Expansion, '1' - 3 Wire MLB)P14: MCAN_MUX_SEL, Signal Mux Control ('0' - MCAN2/GPIO, '1' - Expansion/EQEP)*/dataToSlave[0] = TCA6424_REG_OUTPUT0 | TCA6424_CMD_AUTO_INC; // 0x04U | 0x80UdataToSlave[1] |= 0xC0;dataToSlave[2] &= ~(0x18);SetupI2CTransfer(handle, 0x22, &dataToSlave[0], 1, &dataToSlave[1], 3);
}

Shine：

已咨询e2e产品线工程师，请关注下面帖子的回复。https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1251148/tda4vm-io-expander-is-stuck-when-using-main-domain-mcan

,

Shine：

请看下面e2e工程师的回复。Is any other firmware running on the other cores? It is possible that some other core is configuring the same IO Expanded.