From 9f95ff5b6ba01db09552b84a0ab79607060a2666 Mon Sep 17 00:00:00 2001 From: Ali Labbene Date: Wed, 11 Dec 2019 08:59:21 +0100 Subject: Official ARM version: v5.4.0 Add CMSIS V5.4.0, please refer to index.html available under \docs folder. Note: content of \CMSIS\Core\Include has been copied under \Include to keep the same structure used in existing projects, and thus avoid projects mass update Note: the following components have been removed from ARM original delivery (as not used in ST packages) - CMSIS_EW2018.pdf - .gitattributes - .gitignore - \Device - \CMSIS - \CoreValidation - \DAP - \Documentation - \DoxyGen - \Driver - \Pack - \RTOS\CMSIS_RTOS_Tutorial.pdf - \RTOS\RTX - \RTOS\Template - \RTOS2\RTX - \Utilities - All ARM/GCC projects files are deleted from \DSP, \RTOS and \RTOS2 Change-Id: Ia026c3f0f0d016627a4fb5a9032852c33d24b4d3 --- docs/Core_A/html/using_CMSIS.html | 185 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 185 insertions(+) create mode 100644 docs/Core_A/html/using_CMSIS.html (limited to 'docs/Core_A/html/using_CMSIS.html') diff --git a/docs/Core_A/html/using_CMSIS.html b/docs/Core_A/html/using_CMSIS.html new file mode 100644 index 0000000..397e885 --- /dev/null +++ b/docs/Core_A/html/using_CMSIS.html @@ -0,0 +1,185 @@ + + + + + +Basic CMSIS Example +CMSIS-Core (Cortex-A): Basic CMSIS Example + + + + + + + + + + + + + + +
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CMSIS-Core (Cortex-A) +  Version 1.1.2 +
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CMSIS-Core support for Cortex-A processor-based devices
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Basic CMSIS Example
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A typical example for using the CMSIS layer is provided below. The example is based on an unspecific Cortex-A9 Device.

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#include <ARMCA9.h> // File name depends on device used
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static const uint32_t TICK_RATE_HZ = 1000U;
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uint32_t volatile msTicks; // Counter for millisecond Interval
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static void SysTick_Handler( void )
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{
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msTicks++; // Increment Counter
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}
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// We use the Private Tiemer (PTIM) of the Cortex-A9 FVP Model here.
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// In general the available Timers are highly vendor specific for Cortex-A processors.
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void private_timer_init(void) {
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PTIM_SetLoadValue ((SystemCoreClock/TICK_RATE_HZ) - 1U);
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PTIM_SetControl (PTIM_GetControl() | 7U);
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/* Install SysTick_Handler as the interrupt function for PTIM */
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IRQ_SetHandler((IRQn_ID_t)PrivTimer_IRQn, SysTick_Handler);
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/* Determine number of implemented priority bits */
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IRQ_SetPriority ((IRQn_ID_t)PrivTimer_IRQn, IRQ_PRIORITY_Msk);
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/* Set lowest priority -1 */
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IRQ_SetPriority ((IRQn_ID_t)PrivTimer_IRQn, GIC_GetPriority((IRQn_ID_t)PrivTimer_IRQn)-1);
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/* Enable IRQ */
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IRQ_Enable ((IRQn_ID_t)PrivTimer_IRQn);
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}
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/* Delay execution for given amount of ticks */
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void Delay(uint32_t ticks) {
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uint32_t tgtTicks = msTicks + ticks; // target tick count to delay execution to
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while (msTicks == tgtTicks) {
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__WFE (); // Power-Down until next Event/Interrupt
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}
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}
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/* main function */
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int main(void)
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{
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/* Initialize device HAL here */
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private_timer_init();
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static uint8_t ledState = 0;
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/* Infinite loop */
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while (1)
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{
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/* Add application code here */
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ledState = !ledState;
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Delay(500);
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}
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}
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+ + + + -- cgit