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AN4104 Datasheet(PDF) 2 Page - STMicroelectronics |
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AN4104 Datasheet(HTML) 2 Page - STMicroelectronics |
2 / 13 page 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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