From 580d25a84baaa160b0afdc096e9aa1e8ca1c2d2b Mon Sep 17 00:00:00 2001 From: Stephen Caudle Date: Mon, 31 Oct 2011 00:16:37 -0400 Subject: Move STM32 example projects in family specific folders --- examples/stm32/f1/stm32-h103/traceswo/Makefile | 23 +++++ examples/stm32/f1/stm32-h103/traceswo/README | 11 +++ examples/stm32/f1/stm32-h103/traceswo/traceswo.c | 100 ++++++++++++++++++++++ examples/stm32/f1/stm32-h103/traceswo/traceswo.ld | 31 +++++++ 4 files changed, 165 insertions(+) create mode 100644 examples/stm32/f1/stm32-h103/traceswo/Makefile create mode 100644 examples/stm32/f1/stm32-h103/traceswo/README create mode 100644 examples/stm32/f1/stm32-h103/traceswo/traceswo.c create mode 100644 examples/stm32/f1/stm32-h103/traceswo/traceswo.ld (limited to 'examples/stm32/f1/stm32-h103/traceswo') diff --git a/examples/stm32/f1/stm32-h103/traceswo/Makefile b/examples/stm32/f1/stm32-h103/traceswo/Makefile new file mode 100644 index 0000000..37510d5 --- /dev/null +++ b/examples/stm32/f1/stm32-h103/traceswo/Makefile @@ -0,0 +1,23 @@ +## +## This file is part of the libopencm3 project. +## +## Copyright (C) 2009 Uwe Hermann +## +## This program is free software: you can redistribute it and/or modify +## it under the terms of the GNU General Public License as published by +## the Free Software Foundation, either version 3 of the License, or +## (at your option) any later version. +## +## This program is distributed in the hope that it will be useful, +## but WITHOUT ANY WARRANTY; without even the implied warranty of +## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +## GNU General Public License for more details. +## +## You should have received a copy of the GNU General Public License +## along with this program. If not, see . +## + +BINARY = traceswo + +include ../../Makefile.include + diff --git a/examples/stm32/f1/stm32-h103/traceswo/README b/examples/stm32/f1/stm32-h103/traceswo/README new file mode 100644 index 0000000..34b5227 --- /dev/null +++ b/examples/stm32/f1/stm32-h103/traceswo/README @@ -0,0 +1,11 @@ +------------------------------------------------------------------------------ +README +------------------------------------------------------------------------------ + +This experimental program sends some characters on the TRACESWO pin using +the Instrumentation Trace Macrocell (ITM) and Trace Port Interface +Unit (TPIU). + +The SWJ-DP port must be in SWD mode and not JTAG mode for the output +to be visible. + diff --git a/examples/stm32/f1/stm32-h103/traceswo/traceswo.c b/examples/stm32/f1/stm32-h103/traceswo/traceswo.c new file mode 100644 index 0000000..8881447 --- /dev/null +++ b/examples/stm32/f1/stm32-h103/traceswo/traceswo.c @@ -0,0 +1,100 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2009 Uwe Hermann + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include + +#include +#include +#include +#include + +void clock_setup(void) +{ + rcc_clock_setup_in_hse_8mhz_out_72mhz(); + + /* Enable GPIOC clock. */ + rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN); +} + +void trace_setup(void) +{ + /* Enable trace subsystem (we'll use ITM and TPIU) */ + SCS_DEMCR |= SCS_DEMCR_TRCENA; + + /* Use Manchester code for asynchronous transmission */ + TPIU_SPPR = TPIU_SPPR_ASYNC_MANCHESTER; + TPIU_ACPR = 7; + + /* Data width is 1 byte */ + TPIU_CSPSR = TPIU_CSPSR_BYTE; + + /* Formatter and flush control */ + TPIU_FFCR &= ~TPIU_FFCR_ENFCONT; + + /* Enable TRACESWO pin for async mode */ + DBGMCU_CR = DBGMCU_CR_TRACE_IOEN | DBGMCU_CR_TRACE_MODE_ASYNC; + + /* Unlock access to ITM registers */ + /* FIXME: Magic numbers... Is this Cortex-M3 generic? */ + *((volatile uint32_t*)0xE0000FB0) = 0xC5ACCE55; + + /* Enable ITM with ID = 1 */ + ITM_TCR = (1 << 16) | ITM_TCR_ITMENA; + /* Enable stimulus port 1 */ + ITM_TER[0] = 1; + +} + +void gpio_setup(void) +{ + /* Set GPIO12 (in GPIO port C) to 'output push-pull'. */ + gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ, + GPIO_CNF_OUTPUT_PUSHPULL, GPIO12); +} + +void trace_send_blocking(char c) +{ + while(!(ITM_STIM[0] & ITM_STIM_FIFOREADY)); + ITM_STIM[0] = c; +} + +int main(void) +{ + int i, j = 0, c = 0; + + clock_setup(); + gpio_setup(); + trace_setup(); + + /* Blink the LED (PC12) on the board with every transmitted byte. */ + while (1) { + gpio_toggle(GPIOC, GPIO12); /* LED on/off */ + trace_send_blocking(c + '0'); + c = (c == 9) ? 0 : c + 1; /* Increment c. */ + if ((j++ % 80) == 0) { /* Newline after line full. */ + trace_send_blocking('\r'); + trace_send_blocking('\n'); + } + for (i = 0; i < 800000; i++) /* Wait a bit. */ + __asm__("NOP"); + } + + return 0; +} diff --git a/examples/stm32/f1/stm32-h103/traceswo/traceswo.ld b/examples/stm32/f1/stm32-h103/traceswo/traceswo.ld new file mode 100644 index 0000000..3409b98 --- /dev/null +++ b/examples/stm32/f1/stm32-h103/traceswo/traceswo.ld @@ -0,0 +1,31 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2009 Uwe Hermann + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +/* Linker script for Olimex STM32-H103 (STM32F103RBT6, 128K flash, 20K RAM). */ + +/* Define memory regions. */ +MEMORY +{ + rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K + ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K +} + +/* Include the common ld script. */ +INCLUDE libopencm3_stm32f1.ld + -- cgit v1.2.3