u8 是 unsigned char
u16 是 unsigned short
u32 是 unsigned int
u8 * 就表示指向unsigned char（无符号字符类型）的指针，属于指针类型。
（1）GPIO_Mode_AIN模拟输入
（2）GPIO_Mode_IN_FLOATING浮空输入
（3）GPIO_Mode_IPD下拉输入
（4）GPIO_Mode_IPU上拉输入
（5）GPIO_Mode_Out_OD开漏输出
（6）GPIO_Mode_Out_PP推挽输出
（7）GPIO_Mode_AF_OD复用开漏输出
（8）GPIO_Mode_AF_PP复用推挽输出
* 单片机IO | PB10 - JP68 - SCL | AD/DA转换模块
| PB11 - JP68 - SDA |
modbus rtu主机读写程序
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2022-07-09
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modbus rtu主机读写程序 （129个子文件） 
STM32ModbusMaster.uvguix.Administrator 90KB stm32f10x_tim.c 107KB stm32f10x_flash.c 61KB stm32f10x_rcc.c 50KB stm32f10x_adc.c 46KB stm32f10x_i2c.c 45KB stm32f10x_can.c 44KB stm32f10x_usart.c 37KB system_stm32f10x.c 36KB stm32f10x_fsmc.c 35KB modbus_master1.c 33KB modbus_master.c 33KB stm32f10x_spi.c 30KB stm32f10x_dma.c 29KB stm32f10x_sdio.c 28KB stm32f10x_gpio.c 23KB stm32f10x_dac.c 19KB core_cm3.c 17KB system_stm32l1xx.c 13KB stm32f10x_cec.c 11KB delay.c 11KB stm32f10x_pwr.c 9KB stm32f10x_rtc.c 8KB stm32f10x_bkp.c 8KB usart.c 7KB misc.c 7KB stm32f10x_exti.c 7KB stm32f10x_wwdg.c 6KB ds18b20.c 5KB stm32f10x_dbgmcu.c 5KB stm32f10x_iwdg.c 5KB stm32f10x_it.c 5KB stm32f10x_crc.c 3KB timer.c 3KB Gpio.c 2KB main.c 2KB sys.c 1KB CRC_16_IBM.c 1KB CRC_16.c 49B STM32ModbusMaster_STM32F103RE_1.0.0.dbgconf 2KB HS-test_STM32F103RE_1.0.0.dbgconf 2KB HS-test_STM32F103RC_1.0.0.dbgconf 2KB HS-test_STM32F103ZE_1.0.0.dbgconf 2KB stm32f10x.h 619KB stm32l1xx.h 351KB core_cm3.h 84KB stm32f10x_tim.h 51KB stm32f10x_rcc.h 30KB stm32f10x_i2c.h 29KB stm32f10x_can.h 27KB stm32f10x_fsmc.h 26KB stm32f10x_flash.h 25KB stm32f10x_sdio.h 21KB stm32f10x_adc.h 21KB stm32f10x_dma.h 20KB stm32f10x_gpio.h 20KB stm32f10x_spi.h 17KB stm32f10x_usart.h 16KB stm32f10x_dac.h 15KB misc.h 9KB stm32f10x_bkp.h 7KB stm32f10x_exti.h 7KB stm32f10x_cec.h 6KB MB_board.h 5KB stm32f10x_pwr.h 4KB stm32f10x_rtc.h 4KB stm32f10x_iwdg.h 4KB stm32f10x_dbgmcu.h 4KB modbus_master.h 4KB stm32f10x_conf.h 3KB crc16.h 3KB stm32f10x_wwdg.h 3KB sys.h 3KB delay.h 2KB Gpio.h 2KB word.h 2KB stm32f10x_crc.h 2KB stm32f10x_it.h 2KB system_stm32l1xx.h 2KB system_stm32f10x.h 2KB ds18b20.h 782B usart.h 479B CRC_16_IBM.h 267B timer.h 172B CRC_16.h 109B JLinkSettings.ini 755B startup_stm32f10x_xl.s 16KB startup_stm32f10x_cl.s 16KB startup_stm32f10x_hd.s 16KB startup_stm32f10x_xl.s 16KB startup_stm32f10x_cl.s 15KB startup_stm32f10x_hd_vl.s 15KB startup_stm32f10x_hd_vl.s 15KB startup_stm32f10x_hd.s 15KB startup_stm32f10x_md_vl.s 14KB startup_stm32l1xx_md.s 14KB startup_stm32f10x_ld_vl.s 13KB startup_stm32f10x_md_vl.s 13KB startup_stm32f10x_xl.s 13KB startup_stm32f10x_xl.s 13KB共 129 条
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