Browse Source
Revert "Revert "F_BUS 128MHz for SPIFIFO.h""
This reverts commit 5dade02144.
teensy4-core
Frank Bösing
6 years ago
1 changed files with 10 additions and 1 deletions
+ 10
- 1
teensy3/SPIFIFO.h
View File
| // The preferred way to set SPI speed is with SPI.beginTransaction() | // The preferred way to set SPI speed is with SPI.beginTransaction() | ||||
| #if F_BUS == 120000000 | |||||
| #if F_BUS == 128000000 | |||||
| #define HAS_SPIFIFO | |||||
| #define SPI_CLOCK_24MHz (SPI_CTAR_PBR(1) | SPI_CTAR_BR(0)) //(128 / 3) * ((1+0)/2) = 21.3MHz | |||||
| #define SPI_CLOCK_16MHz (SPI_CTAR_PBR(0) | SPI_CTAR_BR(2)) //(128 / 2) * ((1+0)/4) | |||||
| #define SPI_CLOCK_12MHz (SPI_CTAR_PBR(1) | SPI_CTAR_BR(2)) //(128 / 3) * ((1+0)/4) = 10.6 MHz | |||||
| #define SPI_CLOCK_8MHz (SPI_CTAR_PBR(0) | SPI_CTAR_BR(6)) //(128 / 2) * ((1+0)/8) | |||||
| #define SPI_CLOCK_6MHz (SPI_CTAR_PBR(1) | SPI_CTAR_BR(6)) //(128 / 3) * ((1+0)/8) = 5.3 MHz | |||||
| #define SPI_CLOCK_4MHz (SPI_CTAR_PBR(3) | SPI_CTAR_BR(6)) //(128 / 5) * ((1+0)/8) = 3.2MHz | |||||
| #elif F_BUS == 120000000 | |||||
| #define HAS_SPIFIFO | #define HAS_SPIFIFO | ||||
| #define SPI_CLOCK_24MHz (SPI_CTAR_PBR(3) | SPI_CTAR_BR(0) | SPI_CTAR_DBR) //(120 / 5) * ((1+1)/2) | #define SPI_CLOCK_24MHz (SPI_CTAR_PBR(3) | SPI_CTAR_BR(0) | SPI_CTAR_DBR) //(120 / 5) * ((1+1)/2) | ||||
| #define SPI_CLOCK_16MHz (SPI_CTAR_PBR(0) | SPI_CTAR_BR(2)) //(120 / 2) * ((1+0)/4) = 15 MHz | #define SPI_CLOCK_16MHz (SPI_CTAR_PBR(0) | SPI_CTAR_BR(2)) //(120 / 2) * ((1+0)/4) = 15 MHz |
Loading…