add:air780E的部分外设iomux

luat/include/luat_i2c.h

@@ -14,5 +14,5 @@ int luat_i2c_read_reg(int id, int addr, int reg, uint16_t* value);
 
 int luat_i2c_transfer(int id, int addr, uint8_t *reg, size_t reg_len, uint8_t *buff, size_t len);
 int luat_i2c_no_block_transfer(int id, int addr, uint8_t is_read, uint8_t *reg, size_t reg_len, uint8_t *buff, size_t len, uint16_t Toms, void *CB, void *pParam);
-
+int luat_i2c_set_iomux(int id, uint8_t value);
 #endif

luat/include/luat_mcu.h

@@ -2,6 +2,13 @@
 #define LUAT_MCU_H
 #include "luat_base.h"
 
+enum
+{
+	LUAT_MCU_PERIPHERAL_UART,
+	LUAT_MCU_PERIPHERAL_I2C,
+	LUAT_MCU_PERIPHERAL_SPI,
+};
+
 int luat_mcu_set_clk(size_t mhz);
 int luat_mcu_get_clk(void);
 

luat/include/luat_uart.h

@@ -155,6 +155,15 @@ typedef struct luat_uart_ctrl_param
  */
 int luat_uart_ctrl(int uart_id, LUAT_UART_CTRL_CMD_E cmd, void* param);
 
+/**
+ * @brief 串口复用函数，目前支持UART0，UART2
+ *
+ * @param uart_id 串口id
+ * @param use_alt_type 如果为1，UART0，复用到GPIO16,GPIO17;UART2复用到GPIO12 GPIO13
+ * @return int 0 失败，其他成功
+ */
+int luat_uart_pre_setup(int uart_id, uint8_t use_alt_type);
+
 #ifdef LUAT_USE_SOFT_UART
 #ifndef __BSP_COMMON_H__
 #include "c_common.h"

luat/modules/luat_lib_mcu.c

@@ -230,6 +230,38 @@ static int l_mcu_set_hardfault_mode(lua_State* L)
 	return 0;
 }
 
+LUAT_WEAK int luat_uart_pre_setup(int uart_id, uint8_t use_alt_type){;}
+LUAT_WEAK int luat_i2c_set_iomux(int id, uint8_t value){;}
+/*
+在外设打开前，将外设IO复用到非默认配置上，目前只支持Air780E的部分外设复用到其他配置，这是一个临时接口，如果后续有更合适的api，本接口将不再更新
+@api mcu.iomux(type, channel, value)
+@int 外设类型，目前只有mcu.UART,mcu.I2C
+@int 总线序号，0~N，
+@int 新的配置，这个需要根据具体平台决定
+@usage
+mcu.iomux(mcu.UART, 2, 1)	-- Air780E的UART2复用到gpio12和gpio13(Air780EG默认是这个复用，不要动)
+mcu.iomux(mcu.UART, 2, 2)	-- Air780E的UART2复用到gpio6和gpio7
+mcu.iomux(mcu.I2C, 0, 1)	-- Air780E的I2C0复用到gpio12和gpio13
+mcu.iomux(mcu.I2C, 0, 2)	-- Air780E的I2C0复用到gpio16和gpio17
+mcu.iomux(mcu.I2C, 1, 1)	-- Air780E的I2C1复用到gpio4和gpio5
+ */
+static int l_mcu_iomux(lua_State* L)
+{
+	int type = luaL_optinteger(L, 1, 0xff);
+	int channel = luaL_optinteger(L, 2, 0xff);
+	int value = luaL_optinteger(L, 3, 0);
+	LLOGD("mcu iomux %d,%d,%d", type, channel, value);
+	switch(type)
+	{
+	case LUAT_MCU_PERIPHERAL_UART:
+		luat_uart_pre_setup(channel, value);
+		break;
+	case LUAT_MCU_PERIPHERAL_I2C:
+		luat_i2c_set_iomux(channel, value);
+		break;
+	}
+	return 0;
+}
 #include "rotable2.h"
 static const rotable_Reg_t reg_mcu[] =
 {
@@ -245,7 +277,14 @@ static const rotable_Reg_t reg_mcu[] =
 	{ "dtick64",		ROREG_FUNC(l_mcu_hw_diff_tick64)},
 	{ "setXTAL",		ROREG_FUNC(l_mcu_set_xtal)},
 	{ "hardfault",	ROREG_FUNC(l_mcu_set_hardfault_mode)},
+	{ "iomux",	ROREG_FUNC(l_mcu_iomux)},
 // #endif
+	//@const UART number 外设类型-串口
+	{ "UART",             ROREG_INT(LUAT_MCU_PERIPHERAL_UART) },
+	//@const UART number 外设类型-I2C
+	{ "I2C",             ROREG_INT(LUAT_MCU_PERIPHERAL_I2C) },
+	//@const UART number 外设类型-SPI
+	{ "SPI",             ROREG_INT(LUAT_MCU_PERIPHERAL_SPI) },
 	{ NULL,             ROREG_INT(0) }
 };