A proof of concept to talk to a sc16is750 spi/i2c connected uart, written for a colleague to test the sc16is750 in one of his designs and developed using a SparkFun SC16IS750 module. http://www.nxp.com/products/interface_and_connectivity/bridges/i2c_spi_slave_to_uart_irda_gpio_bridges/series/SC16IS740_750_760.html https://www.sparkfun.com/products/retired/9745 (p/n BOB-09745) https://www.sparkfun.com/products/9981 (p/n BOB-09981) Tested using both the i2c and the spi interface of a raspberry pi, because that's my canonical testing platform... :-) Usage: ./sc16is7xx_demo [options] -d DEV i2c or spi device node (df: /dev/i2c-0) -a ADDR select i2c address (0 = spi, def: 77) -b BAUD select baudrate (df: 115200) -g 0xNN set gpio port to value N If your sc16is750 module is connected via spi, then run... ./sc16is7xx_demo -d /dev/spidev-0.0 -a0 ...or if it's connected via i2c, then run... ./sc16is7xx_demo -d /dev/i2c-0 -a 0xADDR The program will print Virtual terminal is /dev/pts/1. and to that terminal you'll connect with a terminal program like 'cu'. cu -l /dev/pts/1 Whatever you now send on the serial terminal should be output on the uart module, and whatever the uart module receive should be printed on the serial terminal.
duxingduo/sc16is17xx_linux_i2c_spi
A very short proof of concept to talk to a sc16is750 spi/i2cconnected UART
C