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px4_fmu-v6x: Limit Slew rate So IMU works with DMA

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The defualt in NuttX is OSPEED of 50Mhz. This is realy a slew
   rate control. At the default high slew rate the overshoot was
   .7 Volts. On a ICM20649 this was causing the device to output
   garbage. All 0s

   N.B. A passive scope or Logic analyser's probes load will mask
   the failure. Useed a FET probe to verify the issue.
This commit is contained in:
David Sidrane 2020-05-28 04:48:55 -07:00 committed by Daniel Agar
parent 5d90c31632
commit 73bb18a053
1 changed files with 17 additions and 15 deletions
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32
boards/px4/fmu-v6x/nuttx-config/include/board.h
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@ -408,25 +408,27 @@
*
*/
#define GPIO_SPI1_MISO GPIO_SPI1_MISO_3 /* PG9 */
#define GPIO_SPI1_MOSI GPIO_SPI1_MOSI_2 /* PB5 */
#define GPIO_SPI1_SCK GPIO_SPI1_SCK_1 /* PA5 */
#define ADJ_SLEW_RATE(p) (((p) & ~GPIO_SPEED_MASK) | (GPIO_SPEED_2MHz))
#define GPIO_SPI2_MISO GPIO_SPI2_MISO_3 /* PI2 */
#define GPIO_SPI2_MOSI GPIO_SPI2_MOSI_4 /* PI3 */
#define GPIO_SPI2_SCK GPIO_SPI2_SCK_6 /* PI1 */
#define GPIO_SPI1_MISO GPIO_SPI1_MISO_3 /* PG9 */
#define GPIO_SPI1_MOSI GPIO_SPI1_MOSI_2 /* PB5 */
#define GPIO_SPI1_SCK ADJ_SLEW_RATE(GPIO_SPI1_SCK_1) /* PA5 */
#define GPIO_SPI3_MISO GPIO_SPI3_MISO_2 /* PC11 */
#define GPIO_SPI3_MOSI GPIO_SPI3_MOSI_3 /* PB2 */
#define GPIO_SPI3_SCK GPIO_SPI3_SCK_2 /* PC10 */
#define GPIO_SPI2_MISO GPIO_SPI2_MISO_3 /* PI2 */
#define GPIO_SPI2_MOSI GPIO_SPI2_MOSI_4 /* PI3 */
#define GPIO_SPI2_SCK ADJ_SLEW_RATE(GPIO_SPI2_SCK_6) /* PI1 */
#define GPIO_SPI5_MISO GPIO_SPI5_MISO_2 /* PH7 */
#define GPIO_SPI5_MOSI GPIO_SPI5_MOSI_1 /* PF11 */
#define GPIO_SPI5_SCK GPIO_SPI5_SCK_1 /* PF7 */
#define GPIO_SPI3_MISO GPIO_SPI3_MISO_2 /* PC11 */
#define GPIO_SPI3_MOSI GPIO_SPI3_MOSI_3 /* PB2 */
#define GPIO_SPI3_SCK ADJ_SLEW_RATE(GPIO_SPI3_SCK_2) /* PC10 */
#define GPIO_SPI6_MISO GPIO_SPI6_MISO_2 /* PA6 */
#define GPIO_SPI6_MOSI GPIO_SPI6_MOSI_1 /* PG14 */
#define GPIO_SPI6_SCK GPIO_SPI6_SCK_3 /* PB3 */
#define GPIO_SPI5_MISO GPIO_SPI5_MISO_2 /* PH7 */
#define GPIO_SPI5_MOSI GPIO_SPI5_MOSI_1 /* PF11 */
#define GPIO_SPI5_SCK ADJ_SLEW_RATE(GPIO_SPI5_SCK_1) /* PF7 */
#define GPIO_SPI6_MISO GPIO_SPI6_MISO_2 /* PA6 */
#define GPIO_SPI6_MOSI GPIO_SPI6_MOSI_1 /* PG14 */
#define GPIO_SPI6_SCK ADJ_SLEW_RATE(GPIO_SPI6_SCK_3) /* PB3 */
/* I2C
*