Iar arm tools toggle gpio example
Always use INP_GPIO(x) before using OUT_GPIO(x) or SET_GPIO_ALT(x,y) #define INP_GPIO(g) *(gpio+((g)/10)) &= ~(7 bit is 1 <- port is HIGH=3.3V printf ( "Button pressed! \n " ) else // port is LOW=0V printf ( "Button released! \n " ) } int main ( int argc, char ** argv ) /* Set GPIO modes */ gpioSetMode ( 4, PI_OUTPUT ) gpioSetMode ( 17, PI_OUTPUT ) gpioSetMode ( 18, PI_OUTPUT ) gpioSetMode ( 23, PI_INPUT ) gpioSetMode ( 24, PI_OUTPUT ) /* Start 1500 us servo pulses on GPIO4 */ gpioServo ( 4, 1500 ) /* Start 75% dutycycle PWM on GPIO17 */ gpioPWM ( 17, 192 ) /* 192/255 = 75% */ start = time_time () while (( time_time () - start ) < 60.
Iar arm tools toggle gpio example how to#
// How to access GPIO registers from C-code on the Raspberry-Pi // Example program // 15-January-2012 // Dom and Gert // Revised: 1 // Access from ARM Running Linux #define BCM2708_PERI_BASE 0x20000000 #define GPIO_BASE (BCM2708_PERI_BASE + 0x200000) /* GPIO controller */ #include #include #include #include #include #define PAGE_SIZE (4*1024) #define BLOCK_SIZE (4*1024) int mem_fd void * gpio_map // I/O access volatile unsigned * gpio // GPIO setup macros. Note: For Raspberry Pi 2 and Pi 3, change BCM2708_PERI_BASE to 0x3F000000 for the code to work. (Thanks to Dom for doing the difficult work of finding and testing the mapping.) Gert van Loo & Dom, have provided some tested code which accesses the GPIO pins through direct GPIO register manipulation in C-code. 10.2.1.2 Example of an (unstructured) BASIC program.8.5 libgpiod - C library and tools for interacting with the linux GPIO character device.8.1 sysfs, part of the raspbian operating system.7.3 Java Webapp GPIO web control via HTTP.6.3.2 RpiScratchIO - Documentation and examples.Over the next few months we will be adding more developer resources and documentation for all the products and technologies that ARM provides. 1.7 rgpio (local & remote /dev/gpiochip I/F) ARM’s developer website includes documentation, tutorials, support resources and more.