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器件型号：CC1352P 主题中讨论的其他器件： CC1310
您好！
我正在 尝试在完成数据发送后关闭 UART 端口、以降低功耗、方法是使用以下代码：
static void uartWriteCallback(UART2_Handle _handle, void *_buf, size_t _size, void *_userArg, int_fast16_t _status)
{
atUartTxSent += _size;
if (atUartTxSent < atUartTxLen) {
UART2_write(atUartHandle, (const void*)&(atUartTxBuff[atUartTxSent]), atUartTxLen - atUartTxSent, NULL);
} else {
SemaphoreP_post(atUartTxSem);
// The following line of code sends system into perpetual reboot
//atUartClose();
}
}
static void atUartClose()
{
if(atUartHandle)
{
UART2_readCancel(atUartHandle);
// TODO: check if the equivalent of the following line is still needed
//UART2_control(atUartHandle, UART_CMD_RXDISABLE, 0);
UART2_writeCancel(atUartHandle);
UART2_close(atUartHandle);
atUartHandle = NULL;
}
}
不涉及信号量的类似代码在具有 UART 驱动器的 CC1310/SDK4.2中效果很好。 但在 CC1352P/SDK v7.1中以某种方式调用该函数来关闭 UART 端口会使系统永久重新启动、并且在 CCS 控制台中会出现如下的 NONSTOP 错误消息：
Cortex_M4_0: Error: (Error -1170 @ 0x0) Unable to access the DAP. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK). (Emulation package 9.12.0.00150) Cortex_M4_0: Trouble Halting Target CPU: (Error -2062 @ 0x0) Unable to halt device. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK). (Emulation package 9.12.0.00150) Cortex_M4_0: Error: (Error -1170 @ 0x0) Unable to access the DAP. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK). (Emulation package 9.12.0.00150) Cortex_M4_0: Trouble Halting Target CPU: (Error -2064 @ 0x0) Unable to read device status. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK). (Emulation package 9.12.0.00150) Cortex_M4_0: Error: (Error -1170 @ 0x0) Unable to access the DAP. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK). (Emulation package 9.12.0.00150) Cortex_M4_0: Trouble Halting Target CPU: (Error -2062 @ 0x0) Unable to halt device. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK). (Emulation package 9.12.0.00150)
我在这里遗漏了什么？ 在写回调函数中删除 semaphore_post ()似乎能够避免永久重新启动,但这种方法有其自己的问题,任何超过 FIFO 缓冲区的数据都不能可靠地发送出去。
建议、谢谢、
ZL
