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Altera SoCAL
16.0
The Altera SoC Abstraction Layer (SoCAL) API Reference Manual
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Used to give software control in enabling DCLK at any time.
SW will need control of the DCLK in specific configuration and partial reconfiguration initialization steps to send spurious DCLKs required by the CB. SW takes ownership for DCLK during normal configuration, partial reconfiguration, error scenerio handshakes including SEU CRC error during partial reconfiguration, SW early abort of partial reconfiguration, and initializatin phase DCLK driving.
During initialization phase, a configuration image loaded into the FPGA can request that DCLK be used as the initialization phase clock instead of the default internal oscillator or optionally the CLKUSR pin. In the case that DCLK is requested, the DCLKCNT register is used by software to control DCLK during the initialization phase.
Software should poll the DCLKSTAT.DCNTDONE write one to clear register to be set when the correct number of DCLKs have completed. Software should clear DCLKSTAT.DCNTDONE before writing to the DCLKCNT register again.
This field only affects the FPGA if CTRL.EN is 1.
Register Layout
Bits | Access | Reset | Description |
---|---|---|---|
[31:0] | RW | 0x0 | Count |
Field : Count - cnt | |
Controls DCLK counter. Software writes a non-zero value into CNT and the FPGA Manager generates the specified number of DCLK pulses and decrements COUNT. This register will read back the original value written by software. Software can write CNT at any time. Field Access Macros: | |
#define | ALT_FPGAMGR_DCLKCNT_CNT_LSB 0 |
#define | ALT_FPGAMGR_DCLKCNT_CNT_MSB 31 |
#define | ALT_FPGAMGR_DCLKCNT_CNT_WIDTH 32 |
#define | ALT_FPGAMGR_DCLKCNT_CNT_SET_MSK 0xffffffff |
#define | ALT_FPGAMGR_DCLKCNT_CNT_CLR_MSK 0x00000000 |
#define | ALT_FPGAMGR_DCLKCNT_CNT_RESET 0x0 |
#define | ALT_FPGAMGR_DCLKCNT_CNT_GET(value) (((value) & 0xffffffff) >> 0) |
#define | ALT_FPGAMGR_DCLKCNT_CNT_SET(value) (((value) << 0) & 0xffffffff) |
Data Structures | |
struct | ALT_FPGAMGR_DCLKCNT_s |
Macros | |
#define | ALT_FPGAMGR_DCLKCNT_RESET 0x00000000 |
#define | ALT_FPGAMGR_DCLKCNT_OFST 0x8 |
Typedefs | |
typedef struct ALT_FPGAMGR_DCLKCNT_s | ALT_FPGAMGR_DCLKCNT_t |
struct ALT_FPGAMGR_DCLKCNT_s |
WARNING: The C register and register group struct declarations are provided for convenience and illustrative purposes. They should, however, be used with caution as the C language standard provides no guarantees about the alignment or atomicity of device memory accesses. The recommended practice for writing hardware drivers is to use the SoCAL access macros and alt_read_word() and alt_write_word() functions.
The struct declaration for register ALT_FPGAMGR_DCLKCNT.
Data Fields | ||
---|---|---|
uint32_t | cnt: 32 | Count |
#define ALT_FPGAMGR_DCLKCNT_CNT_LSB 0 |
The Least Significant Bit (LSB) position of the ALT_FPGAMGR_DCLKCNT_CNT register field.
#define ALT_FPGAMGR_DCLKCNT_CNT_MSB 31 |
The Most Significant Bit (MSB) position of the ALT_FPGAMGR_DCLKCNT_CNT register field.
#define ALT_FPGAMGR_DCLKCNT_CNT_WIDTH 32 |
The width in bits of the ALT_FPGAMGR_DCLKCNT_CNT register field.
#define ALT_FPGAMGR_DCLKCNT_CNT_SET_MSK 0xffffffff |
The mask used to set the ALT_FPGAMGR_DCLKCNT_CNT register field value.
#define ALT_FPGAMGR_DCLKCNT_CNT_CLR_MSK 0x00000000 |
The mask used to clear the ALT_FPGAMGR_DCLKCNT_CNT register field value.
#define ALT_FPGAMGR_DCLKCNT_CNT_RESET 0x0 |
The reset value of the ALT_FPGAMGR_DCLKCNT_CNT register field.
#define ALT_FPGAMGR_DCLKCNT_CNT_GET | ( | value | ) | (((value) & 0xffffffff) >> 0) |
Extracts the ALT_FPGAMGR_DCLKCNT_CNT field value from a register.
#define ALT_FPGAMGR_DCLKCNT_CNT_SET | ( | value | ) | (((value) << 0) & 0xffffffff) |
Produces a ALT_FPGAMGR_DCLKCNT_CNT register field value suitable for setting the register.
#define ALT_FPGAMGR_DCLKCNT_RESET 0x00000000 |
The reset value of the ALT_FPGAMGR_DCLKCNT register.
#define ALT_FPGAMGR_DCLKCNT_OFST 0x8 |
The byte offset of the ALT_FPGAMGR_DCLKCNT register from the beginning of the component.
typedef struct ALT_FPGAMGR_DCLKCNT_s ALT_FPGAMGR_DCLKCNT_t |
The typedef declaration for register ALT_FPGAMGR_DCLKCNT.