From 95486d1430d2c3f66a07c99771088a80afbb8735 Mon Sep 17 00:00:00 2001 From: Tilman Sauerbeck Date: Mon, 30 Dec 2019 11:42:42 +0100 Subject: [PATCH] application: Set up pins for the GPS. This configures UART0 as well as the GPS' reset line. --- src/application/main.rs | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/src/application/main.rs b/src/application/main.rs index dffa4ee..edb234e 100644 --- a/src/application/main.rs +++ b/src/application/main.rs @@ -36,6 +36,7 @@ use common::port; use common::gpio; use common::nvic; use common::i2c; +use common::uart; use common::usb_serial; use common::display; @@ -64,6 +65,14 @@ pub unsafe extern "C" fn _start() -> ! { gpio::set_direction(gpio::GPIOB, 1 << 16, gpio::Direction::Output); port::set_af(port::PORTB, 16, 1); + // Configure pins for UART0. + port::set_af(port::PORTE, 20, 4); + port::set_af(port::PORTE, 21, 4); + + // Configure pin for the GPS's reset line. + gpio::set_direction(gpio::GPIOB, 1 << 1, gpio::Direction::Output); + port::set_af(port::PORTB, 1, 1); + // Configure upper right push button. gpio::set_direction(gpio::GPIOA, 1 << 12, gpio::Direction::Input); port::set_af(port::PORTA, 12, 1); @@ -81,6 +90,15 @@ pub unsafe extern "C" fn _start() -> ! { display.init(); display.clear(); + // Hold GPS in reset while configuring its UART. + gpio::clear(gpio::GPIOB, 1); + systick::delay_ms(50); + uart::configure(uart::UART0); + systick::delay_ms(50); + gpio::set(gpio::GPIOB, 1); + + nvic::enable_irq(12); // UART0 + loop { systick::delay_ms(1000); -- 2.30.2