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products:sbc:common:applications:gpio:spi [2022/12/20 04:32] nick |
products:sbc:common:applications:gpio:spi [2025/02/17 21:40] (current) nick [Enable SPI] |
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- | ====== SPI ====== | ||
- | ===== Introduction ===== | ||
- | SPI interface usage examples on [[products: | + | ===== SPI Reference table ===== |
- | ===== Reference table ===== | + | | |
- | + | ^ VIM3/ | |
- | | | + | | ::: | ::: |
- | ^ VIM3/ | + | | ::: | ::: |
- | | ::: | ::: | 16 | SPIB_SCLK | + | | ::: | ::: |
- | | ::: | ::: | 35 | SPIB_MISO | + | ^ VIM4 |
- | | ::: | ::: | 37 | SPIB_MOSI | + | | ::: | ::: |
- | ^ VIM4 | + | | ::: | ::: |
- | | ::: | + | | ::: | ::: |
- | | ::: | + | ^ VIM1S | |
- | | ::: | + | | ::: | ::: |
- | ^ VIM1S | | + | | ::: | ::: |
- | | ::: | + | | ::: | ::: |
- | | ::: | + | |
- | | ::: | + | |
===== Enable SPI ===== | ===== Enable SPI ===== | ||
Line 46: | Line 42: | ||
``` | ``` | ||
- | < | + | < |
- | TODO. | + | Edit ''/ |
+ | |||
+ | e.g. Enable '' | ||
+ | |||
+ | ```shell | ||
+ | fdt_overlays=spi1 | ||
+ | ``` | ||
+ | |||
+ | After reboot, you will see the SPI device node. | ||
+ | |||
+ | ```shell | ||
+ | $ ls / | ||
+ | / | ||
+ | ``` | ||
+ | |||
+ | <tabbox VIM3L with 5.15 kernel> | ||
+ | |||
+ | Edit ''/ | ||
+ | |||
+ | |||
+ | e.g. Enable '' | ||
+ | |||
+ | ```shell | ||
+ | fdt_overlays=spi1 | ||
+ | |||
+ | ``` | ||
+ | |||
+ | After reboot, you will see the SPI device node. | ||
+ | |||
+ | ```shell | ||
+ | $ ls / | ||
+ | / | ||
+ | ``` | ||
+ | |||
+ | <tabbox VIM4> | ||
+ | |||
+ | Edit ''/ | ||
+ | |||
+ | |||
+ | e.g. Enable '' | ||
+ | |||
+ | ```shell | ||
+ | fdt_overlays=spi0 | ||
+ | |||
+ | ``` | ||
+ | |||
+ | After reboot, you will see the SPI device node. | ||
+ | |||
+ | ```shell | ||
+ | $ ls / | ||
+ | / | ||
+ | ``` | ||
+ | <tabbox VIM1S> | ||
+ | |||
+ | Edit ''/ | ||
+ | |||
+ | |||
+ | e.g. Enable '' | ||
+ | |||
+ | ```shell | ||
+ | fdt_overlays=spi0 | ||
+ | |||
+ | ``` | ||
+ | |||
+ | After reboot, you will see the SPI device node. | ||
+ | |||
+ | ```shell | ||
+ | $ ls / | ||
+ | / | ||
+ | ``` | ||
</ | </ | ||
Line 93: | Line 158: | ||
} | } | ||
- | static const char *device = "/ | + | static const char *device = "/ |
static uint32_t mode; | static uint32_t mode; | ||
static uint8_t bits = 8; | static uint8_t bits = 8; | ||
Line 556: | Line 621: | ||
``` | ``` | ||
- | Run '' | + | Connect PIN36(MOSI), |
+ | |||
```shell | ```shell | ||
- | $ ./ | + | $ ./ |
spi mode: 0x0 | spi mode: 0x0 | ||
bits per word: 8 | bits per word: 8 | ||
max speed: 500000 Hz (500 KHz) | max speed: 500000 Hz (500 KHz) | ||
``` | ``` | ||
+ | |||
+ | <WRAP important > | ||
+ | Please choose the correct spi device node. | ||
+ | </ | ||
+ | |||
Check output data: | Check output data: |