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AN4104 Datasheet(PDF) 2 Page - STMicroelectronics

Part # AN4104
Description  Using the STM32F0xx DMA controller
Download  13 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4104 Datasheet(HTML) 2 Page - STMicroelectronics

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Contents
AN4104
2/13
Doc ID 023131 Rev 1
Contents
1
DMA controller description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1
DMA Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2
DMA Data managing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2.1
Round robin priority scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2.2
Peripheral to Memory, Memory to Peripheral and Peripheral to Peripheral
DMA transactions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2.3
Memory to Memory DMA transactions . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2.4
Choosing channel priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3
DMA Interrupt management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2
DMA firmware driver API . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1
How to use DMA Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3
DMA programming examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1
ADC DMA transfer to TIM example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2
DMA Flash to RAM example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3
DMA RAM to DAC example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.4
SPI DMA example: communication between two SPIs using DMA . . . . . 11
3.5
USART communication boards data exchange using DMA example . . . 11
4
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12


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