stm32h7_spi_...ne_dma_start(9)

💅 stm32h7_spi_transfer_one_dma_start(9) — like, the whole glow-up ✨

okay bestie, so picture this: you're deep in the Kernel API Manual (yes, that manual, the one with the pages that go on forever 🫶) and you land on this little icon. It's stm32h7_spi_transfer_one_dma_start — and no, the header doesn't finish the name, the ellipsis is just the manual being dramatic 💀. Anyway. Let's get into it.

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🎀 NAME 🎀

stm32h7_spi_transfer_one_dma_start — sets the SPI driver registers so a transfer can kick off using DMA. That's the whole vibe. Registers get set, DMA does its thing, slay. ✨

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🦋 SYNOPSIS 🦋

void stm32h7_spi_transfer_one_dma_start (struct stm32_spi *spi );

literally that's it. one function, one arg, void return — she gives nothing back and she doesn't need to. main character energy tbh 👑

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🌸 ARGUMENTS 🌸

• spi — pointer to the spi controller data structure 🫶. yep, just the one. she's the pointer to the spi controller data structure, that's her job, and she's doing it beautifully.

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⭐ SEE ALSO ⭐

okay so this function does not exist in a vacuum, she has a whole friend group 😭 and the manual wants you to know every single one. also worth shouting out: the kernel file ./drivers/spi/spi-stm32.c — that's where the lore lives 📖

💜 the structs (the OGs)

• struct stm32_spi_reg(9)
• struct stm32_spi_regspec(9)
• struct stm32_spi_cfg(9)
• struct stm32_spi(9)

🧚 fifo size & bpw masks (the measuring girls)

• stm32h7_spi_get_fifo_size(9)
• stm32f4_spi_get_bpw_mask(9)
• stm32f7_spi_get_bpw_mask(9)
• stm32h7_spi_get_bpw_mask(9)
• stm32mp25_spi_get_bpw_mask(9)

🍓 preparing stuff

• stm32_spi_prepare_mbr(9)
• stm32h7_spi_prepare_fthlv(9)

💅 sending it (tx)

• stm32f4_spi_write_tx(9)
• stm32f7_spi_write_tx(9)
• stm32h7_spi_write_txfifo(9)

🦋 receiving it (rx)

• stm32f4_spi_read_rx(9)
• stm32f7_spi_read_rx(9)
• stm32h7_spi_read_rxfifo(9)

✨ on & off (the power couple)

• stm32_spi_enable(9)
• stm32fx_spi_disable(9)
• stm32h7_spi_disable(9)

🔥 dma check

• stm32_spi_can_dma(9)

🎀 irq girlies

• stm32fx_spi_irq_event(9)
• stm32fx_spi_irq_thread(9)
• stm32h7_spi_irq_thread(9)

🌈 messages & dma callbacks

• stm32_spi_prepare_msg(9)
• stm32fx_spi_dma_tx_cb(9)
• stm32_spi_dma_rx_cb(9)
• stm32_spi_dma_config(9)

👑 transfer_one, all the variants (a whole family)

• stm32fx_spi_transfer_one_irq(9)
• stm32h7_spi_transfer_one_poll(9)
• stm32h7_spi_transfer_one_irq(9)
• stm32fx_spi_transfer_one_dma_start(9)
• stm32f7_spi_transfer_one_dma_start(9)
• stm32_spi_prepare_rx_dma_mdma_chaining(9)
• stm32_spi_transfer_one_dma(9)

🧚 bpw / mbr / modes / setup (the setters, iykyk)

• stm32f4_spi_set_bpw(9)
• stm32f7_spi_set_bpw(9)
• stm32h7_spi_set_bpw(9)
• stm32_spi_set_mbr(9)
• stm32_spi_communication_type(9)
• stm32fx_spi_set_mode(9)
• stm32h7_spi_set_mode(9)
• stm32h7_spi_data_idleness(9)
• stm32h7_spi_number_of_data(9)
• stm32_spi_transfer_one_setup(9)
• stm32_spi_can_poll(9)
• stm32_spi_transfer_one(9)
• stm32_spi_unprepare_msg(9)

💀 the configs

• stm32fx_spi_config(9)
• stm32h7_spi_config(9)

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no cap, that's every single one — go read them all, bestie, they're all part of the same story 🫶

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mwah 💋 this little page lives in ./drivers/spi and it's stamped October 2026 — so go forth, set those registers, let DMA cook, and remember: you ate. periodt. 🌈✨